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STATISTICS FOR THE UNITED STATES OF AMERICA

STATISTICS FOR THE UNITED STATES OF AMERICA


GEMS/WATER - STATISTICAL SUMMARY BY STATION     2002-01-24   PAGE 933

 STATION - MISSISSIPPI RIVER                        STATION NO. 028001
 COUNTRY - UNITED STATES                            DEPTH(M)      14.0
 LOCATION - OCT. 1  LAT. 32/18/45  LONG. 090/54/25  ELEVATION(M)  21.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-02-15 TO 1993-10-15

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3        NH3
                             COND                                            
                            02041      02061      07105      07551      07555
                            us/cm      deg C     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         12         12          9          2
 MEAN                        355.       17.0       1.63       0.04       0.02
 MINIMUM                     320.        5.0       0.80       0.01           
 DATE OF MINIMUM       1993-01-22 1993-01-22 1991-11-15 1991-05-31           
 10TH PERCENTILE             320.        5.4       0.86       0.01           
 MEDIAN                      349.       16.8       1.70       0.04           
 90TH PERCENTILE             390.       28.8       2.07       0.07           
 MAXIMUM                     408.       29.5       2.20       0.07           
 DATE OF MAXIMUM       1992-10-23 1991-07-26 1993-07-23 1991-11-15           
 STANDARD DEVIATION           28.        9.3       0.41       0.02           




                               O2         O2          F         pH         Na
                             DISS       DISS       DISS                  DISS
                            08101      08102      09104      10301      11102
                          mg/L O2    mg/L O2     mg/L F   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES        0          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2         10         11         12         11
 MEAN                         7.0        9.4        0.2        7.8        17.
 MINIMUM                                 5.7        0.1        7.5        10.
 DATE OF MINIMUM                  1993-07-23 1991-02-15 1991-07-26 1993-07-23
 10TH PERCENTILE                         5.7        0.1        7.5        10.
 MEDIAN                                 10.0        0.2        7.9        14.
 90TH PERCENTILE                        11.4        0.3        8.1        24.
 MAXIMUM                                11.5        0.3        8.1        29.
 DATE OF MAXIMUM                  1993-01-22 1993-10-15 1992-01-10 1991-11-15
 STANDARD DEVIATION                      2.1        0.1        0.2         6.




                               Na         Mg         Al         Si          P
                             DISS       DISS       DISS   REACTIVE      TOTAL
                            11105      12102      13102      14101      15405
                          mg/L Na    mg/L Mg    mg/L Al   mg/LSiO2     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          3          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2         12          9         12         12
 MEAN                         10.        12.      0.032       7.02      0.178
 MINIMUM                                 10.      0.010       5.10      0.090
 DATE OF MINIMUM                  1992-04-03 1991-02-15 1992-07-24 1993-04-30
 10TH PERCENTILE                         10.      0.010       5.28      0.096
 MEDIAN                                  12.      0.020       6.75      0.165
 90TH PERCENTILE                         14.      0.050       8.59      0.227
 MAXIMUM                                 15.      0.110       9.70      0.320
 DATE OF MAXIMUM                  1992-10-23 1993-01-22 1993-07-23 1993-07-23
 STANDARD DEVIATION                       2.      0.028       1.26      0.059




                          P TOTAL   SULPHATE         Cl          K         Ca
                             DISS                  DISS       DISS       DISS
                            15417      16303      17203      19102      20103
                           mg/L P   mg/L SO4    mg/L Cl     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         12         12         12         12
 MEAN                       0.077        43.        19.        3.2     39.750
 MINIMUM                    0.030        28.        11.        2.4     35.000
 DATE OF MINIMUM       1992-04-03 1993-07-23 1991-05-31 1992-04-03 1993-01-22
 10TH PERCENTILE            0.036        28.        11.        2.4     35.400
 MEDIAN                     0.070        40.        18.        3.2     39.000
 90TH PERCENTILE            0.090        55.        26.        3.8     43.700
 MAXIMUM                    0.160        64.        32.        4.2     46.000
 DATE OF MAXIMUM       1992-10-23 1991-11-15 1992-07-24 1993-10-15 1992-10-23
 STANDARD DEVIATION         0.030        11.         6.        0.5      3.223




                               Cr         Mn         Fe         Ni         Cu
                             DISS       DISS      TOTAL       DISS       DISS
                            24052      25104      26004      28102      29105
                          mg/L Cr    mg/L Mn    mg/L Fe    mg/L Ni    mg/L Cu


 NO. OF L-FLAGGED VALUES        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         12         12         12          3
 MEAN                       0.001       0.00       0.03      0.002      0.004
 MINIMUM                                0.00       0.01      0.001           
 DATE OF MINIMUM                  1991-07-26 1992-10-23 1991-02-15           
 10TH PERCENTILE                        0.00       0.01      0.001           
 MEDIAN                                 0.00       0.02      0.002           
 90TH PERCENTILE                        0.01       0.05      0.003           
 MAXIMUM                                0.02       0.15      0.003           
 DATE OF MAXIMUM                  1993-01-22 1993-01-22 1992-07-24           
 STANDARD DEVIATION                     0.01       0.04      0.001           




                               Zn         As         Se   FAEC COL         Cd
                             DISS       DISS       DISS                  DISS
                            30104      33104      34102      36012      48101
                          mg/L Zn    mg/L As    mg/L Se   No/100ml    mg/L Cd


 NO. OF L-FLAGGED VALUES        1          1         12          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          2          0         12          1
 MEAN                       0.006      0.002      0.001       590.      0.001
 MINIMUM                                          0.001        46.           
 DATE OF MINIMUM                             1991-02-15 1992-07-24           
 10TH PERCENTILE                                  0.001        50.           
 MEDIAN                                           0.001       160.           
 90TH PERCENTILE                                  0.001       738.           
 MAXIMUM                                          0.001      4100.           
 DATE OF MAXIMUM                             1993-10-15 1991-11-15           
 STANDARD DEVIATION                               0.000      1132.           




                               Hg         Pb       INST
                             DISS       DISS     DISCHG
                            80111      82101      97160
                          ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        3          1          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        0          2         12
 MEAN                       0.100      0.001    21542.1
 MINIMUM                                         8496.0
 DATE OF MINIMUM                             1992-10-23
 10TH PERCENTILE                                 8909.5
 MEDIAN                                         24072.1
 90TH PERCENTILE                                29716.2
 MAXIMUM                                        36363.0
 DATE OF MAXIMUM                             1993-04-30
 STANDARD DEVIATION                              8576.2





 STATION - COLUMBIA RIVER                           STATION NO. 028002
 COUNTRY - UNITED STATES                            DEPTH(M)      18.0
 LOCATION - OCT. 1  LAT. 45/36/45  LONG. 122/01/35  ELEVATION(M)   3.7
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-03-27 TO 1993-08-04

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          1          6          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       88         88         10          5         88
 MEAN                        148.       14.6       0.14       0.01       10.9
 MINIMUM                     112.        1.6       0.05       0.01        8.6
 DATE OF MINIMUM       1993-06-25 1993-01-26 1991-08-27 1991-03-27 1991-08-27
 10TH PERCENTILE             130.        1.6       0.05       0.01        9.2
 MEDIAN                      146.       20.5       0.10       0.01        9.7
 90TH PERCENTILE             162.       21.9       0.20       0.02       13.6
 MAXIMUM                     180.       22.0       0.30       0.02       13.8
 DATE OF MAXIMUM       1992-03-24 1992-08-18 1991-03-27 1993-08-04 1991-03-27
 STANDARD DEVIATION           12.        9.2       0.08       0.00        1.9




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11102      12102      13102
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        1          0          0          0          6
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         88         11         11          5
 MEAN                         0.2        7.9         5.         5.      0.023
 MINIMUM                      0.1        7.7         5.         3.      0.010
 DATE OF MINIMUM       1991-03-27 1993-08-04 1991-03-27 1993-06-25 1991-05-22
 10TH PERCENTILE              0.1        7.8         5.         3.      0.010
 MEDIAN                       0.2        7.9         5.         5.      0.010
 90TH PERCENTILE              0.2        8.0         6.         5.      0.029
 MAXIMUM                      0.2        8.5         7.         6.      0.120
 DATE OF MAXIMUM       1992-05-13 1992-05-13 1992-03-24 1992-03-24 1993-01-26
 STANDARD DEVIATION           0.1        0.1         1.         1.      0.033




                               Si          P    P TOTAL   SULPHATE         Cl
                         REACTIVE      TOTAL       DISS                  DISS
                            14101      15405      15417      16303      17203
                         mg/LSiO2     mg/L P     mg/L P   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          1          4          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         10          7         11         11
 MEAN                        8.48      0.026      0.014        11.         3.
 MINIMUM                     6.10      0.010      0.010         7.         2.
 DATE OF MINIMUM       1992-08-18 1991-05-22 1991-03-27 1993-06-25 1991-05-22
 10TH PERCENTILE             6.17      0.010      0.010         7.         2.
 MEDIAN                      9.00      0.020      0.010        11.         3.
 90TH PERCENTILE             9.80      0.030      0.020        12.         4.
 MAXIMUM                    10.00      0.080      0.020        15.         5.
 DATE OF MAXIMUM       1993-06-25 1991-11-27 1992-11-18 1992-03-24 1992-03-24
 STANDARD DEVIATION          1.35      0.019      0.005         2.         1.



                                K         Ca         Cr         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            19102      20103      24052      25104      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          3          6          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         11          0          5         10
 MEAN                         1.1     17.182      0.001       0.00       0.01
 MINIMUM                      0.9     13.000                  0.00       0.00
 DATE OF MINIMUM       1991-08-27 1993-06-25            1991-03-27 1992-08-18
 10TH PERCENTILE              0.9     13.300                  0.00       0.00
 MEDIAN                       1.1     17.000                  0.00       0.01
 90TH PERCENTILE              1.2     19.900                  0.00       0.02
 MAXIMUM                      1.4     21.000                  0.00       0.02
 DATE OF MAXIMUM       1992-03-24 1992-03-24            1993-08-04 1992-05-13
 STANDARD DEVIATION           0.1      2.228                  0.00       0.01




                               Ni         Cu         Zn         As         Se
                             DISS       DISS       DISS       DISS       DISS
                            28102      29105      30104      33104      34102
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Se


 NO. OF L-FLAGGED VALUES       10          0          2          3         11
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          3          1          0          0
 MEAN                       0.001      0.002      0.004      0.001      0.001
 MINIMUM                    0.001                                       0.001
 DATE OF MINIMUM       1991-03-27                                  1991-03-27
 10TH PERCENTILE            0.001                                       0.001
 MEDIAN                     0.001                                       0.001
 90TH PERCENTILE            0.001                                       0.001
 MAXIMUM                    0.001                                       0.001
 DATE OF MAXIMUM       1993-08-04                                  1993-08-04
 STANDARD DEVIATION         0.000                                       0.000




                         FAEC COL         Cd         Hg         Pb       INST
                                        DISS       DISS       DISS     DISCHG
                            36012      48101      80111      82101      97160
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        0          3          2          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11          0          1          1         35
 MEAN                          6.      0.001      0.100      0.001     2973.6
 MINIMUM                       1.                                      2973.6
 DATE OF MINIMUM       1991-03-27                                  1992-08-18
 10TH PERCENTILE               1.                                      2973.6
 MEDIAN                        5.                                      2973.6
 90TH PERCENTILE              12.                                      2973.6
 MAXIMUM                      14.                                      2973.6
 DATE OF MAXIMUM       1992-11-18                                  1992-08-18
 STANDARD DEVIATION            4.                                         0.0





 STATION - YUKON RIVER                              STATION NO. 028003
 COUNTRY - UNITED STATES                            DEPTH(M)      11.0
 LOCATION - OCT. 1  LAT. 61/56/04  LONG. 162/52/50  ELEVATION(M)   9.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-04-12 TO 1993-09-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       33         35         11         10         22
 MEAN                        198.       13.0       0.16       0.05        8.1
 MINIMUM                       0.        0.0       0.07       0.01        2.1
 DATE OF MINIMUM       1992-06-16 1991-04-12 1992-06-16 1991-09-05 1993-03-31
 10TH PERCENTILE             137.        4.8       0.07       0.01        3.3
 MEDIAN                      209.       12.3       0.10       0.03        8.2
 90TH PERCENTILE             218.       20.3       0.20       0.10        9.9
 MAXIMUM                     305.       20.5       0.40       0.11       10.7
 DATE OF MAXIMUM       1993-03-31 1991-07-11 1991-09-05 1993-06-04 1993-09-16
 STANDARD DEVIATION           54.        5.6       0.10       0.04        2.2




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10101      10301      11102      12102
                           mg/L F       mg/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        4          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         11         36         11         11
 MEAN                         0.1      77.00        7.7         3.         7.
 MINIMUM                      0.1       0.00        7.0         1.         4.
 DATE OF MINIMUM       1991-07-11 1991-09-05 1993-03-31 1992-06-16 1992-06-16
 10TH PERCENTILE              0.1       0.00        7.1         1.         4.
 MEDIAN                       0.1      76.00        7.8         3.         7.
 90TH PERCENTILE              0.2     135.30        8.0         4.        10.
 MAXIMUM                      0.2     138.00        8.4         4.        10.
 DATE OF MAXIMUM       1992-04-15 1993-03-31 1993-09-16 1992-04-15 1992-04-15
 STANDARD DEVIATION           0.0      47.17        0.3         1.         2.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        2          0          0          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        9         11         11          7         11
 MEAN                       0.096       7.74      0.125      0.018        24.
 MINIMUM                    0.010       4.10      0.020      0.010        11.
 DATE OF MINIMUM       1992-04-15 1992-06-16 1991-04-12 1991-09-05 1992-06-16
 10TH PERCENTILE            0.010       4.25      0.020      0.010        11.
 MEDIAN                     0.060       6.90      0.050      0.010        25.
 90TH PERCENTILE            0.257      11.90      0.294      0.030        28.
 MAXIMUM                    0.300      12.00      0.450      0.040        31.
 DATE OF MAXIMUM       1993-06-04 1993-03-31 1991-07-11 1993-06-04 1993-09-16
 STANDARD DEVIATION         0.100       2.68      0.144      0.011         6.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         11         11          1         11
 MEAN                          1.        1.3     32.636      0.002       0.04
 MINIMUM                       0.        1.0     21.000                  0.01
 DATE OF MINIMUM       1991-09-05 1993-09-16 1993-06-04            1991-07-11
 10TH PERCENTILE               0.        1.0     21.300                  0.01
 MEDIAN                        1.        1.2     30.000                  0.01
 90TH PERCENTILE               1.        1.5     44.700                  0.12
 MAXIMUM                       3.        1.6     46.000                  0.13
 DATE OF MAXIMUM       1993-03-31 1992-07-30 1992-04-15            1992-04-15
 STANDARD DEVIATION            1.        0.2      8.176                  0.05




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        0          2          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11          9          3          3          2
 MEAN                        0.34      0.002      0.004      0.009      0.001
 MINIMUM                     0.07      0.001                                 
 DATE OF MINIMUM       1992-04-15 1991-09-05                                 
 10TH PERCENTILE             0.08      0.001                                 
 MEDIAN                      0.27      0.001                                 
 90TH PERCENTILE             0.67      0.002                                 
 MAXIMUM                     1.10      0.003                                 
 DATE OF MAXIMUM       1991-04-12 1991-04-12                                 
 STANDARD DEVIATION          0.30      0.001                                 




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       11          5          3          2          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          5          0          1          1
 MEAN                       0.001         4.      0.001      0.100      0.002
 MINIMUM                    0.001         0.                                 
 DATE OF MINIMUM       1991-04-12 1991-04-12                                 
 10TH PERCENTILE            0.001         0.                                 
 MEDIAN                     0.001         1.                                 
 90TH PERCENTILE            0.001        13.                                 
 MAXIMUM                    0.001        16.                                 
 DATE OF MAXIMUM       1993-09-16 1993-09-16                                 
 STANDARD DEVIATION         0.000         6.                                 



                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       11
 MEAN                     11001.3
 MINIMUM                   1274.4
 DATE OF MINIMUM       1992-04-15
 10TH PERCENTILE           1287.7
 MEDIAN                   12602.4
 90TH PERCENTILE          19863.7
 MAXIMUM                  21126.8
 DATE OF MAXIMUM       1993-06-04
 STANDARD DEVIATION        7050.3





 STATION - MISSOURI RIVER                           STATION NO. 028004
 COUNTRY - UNITED STATES                            DEPTH(M)       4.6
 LOCATION - OCT. 1  LAT. 38/42/36  LONG. 091/26/21  ELEVATION(M) 150.3
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-08 TO 1993-11-01

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP          B   ORG CARB     NO3NO2
                             COND                  DISS       DISS           
                            02041      02061      05101      06101      07105
                            us/cm      deg C     mg/L B     mg/L C     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       58        243          1         43         54
 MEAN                        531.       12.8        0.1      230.0       1.74
 MINIMUM                     266.        1.0                   2.6       0.30
 DATE OF MINIMUM       1992-11-24 1991-01-08            1991-10-29 1991-08-05
 10TH PERCENTILE             374.        6.0                   2.9       0.84
 MEDIAN                      544.        8.5                   4.4       1.70
 90TH PERCENTILE             679.       26.0                 376.0       2.56
 MAXIMUM                     704.       31.0                3300.0       3.20
 DATE OF MAXIMUM       1992-06-01 1991-07-22            1991-04-16 1992-05-05
 STANDARD DEVIATION          110.        8.0                 725.5       0.70




                              NH3         O2          F        ALK         pH
                                        DISS       DISS      TOTAL           
                            07551      08102      09104      10101      10301
                           mg/L N    mg/L O2     mg/L F       mg/L   pH UNITS


 NO. OF L-FLAGGED VALUES        4          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       50         12         13          3         58
 MEAN                        0.04        9.7        0.3     143.67        8.0
 MINIMUM                     0.01        4.0        0.2                   6.9
 DATE OF MINIMUM       1991-05-24 1992-07-16 1991-05-28            1993-08-06
 10TH PERCENTILE             0.01        4.5        0.2                   7.5
 MEDIAN                      0.03        9.1        0.3                   8.1
 90TH PERCENTILE             0.07       13.0        0.4                   8.3
 MAXIMUM                     0.22       15.5        0.5                   8.8
 DATE OF MAXIMUM       1991-01-08 1991-01-08 1991-11-04            1991-04-16
 STANDARD DEVIATION          0.04        3.3        0.1                   0.3




                               Na         Mg         Al         Si          P
                             DISS       DISS       DISS   REACTIVE      TOTAL
                            11102      12102      13102      14101      15405
                          mg/L Na    mg/L Mg    mg/L Al   mg/LSiO2     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          5          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13          8         13         42
 MEAN                         29.        16.      0.092      11.45      0.310
 MINIMUM                       4.         8.      0.010       6.50      0.000
 DATE OF MINIMUM       1991-05-28 1992-11-24 1991-01-08 1991-09-03 1991-04-16
 10TH PERCENTILE               6.         9.      0.010       7.01      0.122
 MEDIAN                       27.        16.      0.020      11.00      0.240
 90TH PERCENTILE              53.        21.      0.316      14.00      0.586
 MAXIMUM                      64.        27.      0.530      22.00      1.000
 DATE OF MAXIMUM       1991-09-03 1991-05-28 1992-07-16 1991-05-28 1992-05-26
 STANDARD DEVIATION           20.         6.      0.174       3.88      0.222




                          P TOTAL   SULPHATE         Cl    LINDANE          K
                             DISS                  DISS                  DISS
                            15417      16303      17203      18070      19102
                           mg/L P   mg/L SO4    mg/L Cl       ug/L     mg/L K


 NO. OF L-FLAGGED VALUES        1          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13         13          0         13
 MEAN                       0.100        90.        17.      0.010        5.5
 MINIMUM                    0.010        26.         5.                   4.6
 DATE OF MINIMUM       1993-08-19 1992-11-24 1991-05-28            1991-05-06
 10TH PERCENTILE            0.010        30.         6.                   4.6
 MEDIAN                     0.095        88.        18.                   5.5
 90TH PERCENTILE            0.170       158.        23.                   5.9
 MAXIMUM                    0.210       180.        30.                   6.6
 DATE OF MAXIMUM       1991-11-04 1991-09-03 1992-01-28            1993-08-06
 STANDARD DEVIATION         0.057        51.         7.                   0.5




                               Ca         Cr         Mn         Fe         Ni
                             DISS       DISS       DISS      TOTAL       DISS
                            20103      24052      25104      26004      28102
                          mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          4          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13          0         12         13         13
 MEAN                      57.000      0.001       0.01       0.12      0.003
 MINIMUM                   30.000      0.001       0.00       0.00      0.002
 DATE OF MINIMUM       1992-11-24 1991-01-08 1991-05-06 1993-05-20 1991-09-03
 10TH PERCENTILE           33.000                  0.00       0.00      0.002
 MEDIAN                    54.000      0.001       0.00       0.03      0.003
 90TH PERCENTILE           67.400                  0.04       0.43      0.004
 MAXIMUM                  120.000      0.001       0.05       0.44      0.005
 DATE OF MAXIMUM       1991-05-28 1991-09-03 1992-07-16 1992-07-16 1992-11-24
 STANDARD DEVIATION        21.633      0.000       0.02       0.18      0.001




                               Cu         Zn         As         Se   FAEC COL
                             DISS       DISS       DISS       DISS           
                            29105      30104      33104      34102      36012
                          mg/L Cu    mg/L Zn    mg/L As    mg/L Se   No/100ml


 NO. OF L-FLAGGED VALUES        1          2          0          6          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          2          4          7         13
 MEAN                       0.002      0.005      0.002      0.001      2308.
 MINIMUM                    0.001      0.003      0.001      0.001        86.
 DATE OF MINIMUM       1991-01-08 1991-01-08 1991-01-08 1991-01-08 1992-01-28
 10TH PERCENTILE                                             0.001        90.
 MEDIAN                     0.003      0.003      0.002      0.001       776.
 90TH PERCENTILE                                             0.002      6420.
 MAXIMUM                    0.004      0.010      0.003      0.002     11000.
 DATE OF MAXIMUM       1991-09-03 1991-05-28 1991-09-03 1992-01-28 1991-05-06
 STANDARD DEVIATION         0.002      0.004      0.001      0.000      3378.




                               Cd         Ba         Hg         Pb       INST
                             DISS      TOTAL       DISS       DISS     DISCHG
                            48101      80016      80111      82101      97160
                          mg/L Cd    ug/L Hg    ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        3          1          2          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          2          3          0        255
 MEAN                       0.002      0.367      0.280      0.001     2114.0
 MINIMUM                    0.001                 0.100      0.001        0.0
 DATE OF MINIMUM       1991-01-08            1991-01-08 1991-01-08 1992-02-18
 10TH PERCENTILE                                                        897.7
 MEDIAN                     0.001                 0.200      0.001     1656.7
 90TH PERCENTILE                                                       4114.9
 MAXIMUM                    0.003                 0.600      0.001    11837.8
 DATE OF MAXIMUM       1991-05-06            1991-09-03 1991-09-03 1993-08-06
 STANDARD DEVIATION         0.001                 0.217      0.000     1356.4





 STATION - SUSQUEHANNA RIVER                        STATION NO. 028005
 COUNTRY - UNITED STATES                            DEPTH(M)       2.0
 LOCATION - OCT. 0  LAT. 40/15/17  LONG. 076/53/11  ELEVATION(M)  89.9
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-02 TO 1993-12-06

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          7          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       58         59         42         35         58
 MEAN                        283.       18.6       1.03       0.04        9.4
 MINIMUM                     119.        1.5       0.10       0.01        4.6
 DATE OF MINIMUM       1991-03-07 1991-01-02 1991-08-06 1991-07-11 1993-06-17
 10TH PERCENTILE             137.        3.0       0.50       0.01        5.3
 MEDIAN                      314.       25.0       0.90       0.03        9.0
 90TH PERCENTILE             392.       28.4       1.40       0.07       12.9
 MAXIMUM                     487.       30.5       5.10       0.12       21.1
 DATE OF MAXIMUM       1993-06-17 1991-05-28 1992-01-08 1991-01-02 1993-06-17
 STANDARD DEVIATION          104.       10.9       0.86       0.02        3.3




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10101      10301      11102      12102
                           mg/L F       mg/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES       16          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        9         27         58         25         25
 MEAN                         0.1      40.67        7.9         9.         7.
 MINIMUM                      0.1      20.00        6.7         4.         3.
 DATE OF MINIMUM       1991-01-02 1993-03-30 1992-08-03 1993-04-06 1991-03-07
 10TH PERCENTILE              0.1      21.00        7.3         4.         4.
 MEDIAN                       0.1      35.00        8.0         7.         5.
 90TH PERCENTILE              0.1      60.30        8.5        14.        12.
 MAXIMUM                      0.2      85.00        8.8        22.        14.
 DATE OF MAXIMUM       1991-11-07 1991-11-07 1993-06-17 1991-09-03 1991-09-03
 STANDARD DEVIATION           0.0      16.39        0.5         5.         4.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        1          0          4         26          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         25         38         16         25
 MEAN                       0.031       3.27      0.074      0.014        45.
 MINIMUM                    0.010       0.05      0.010      0.005        16.
 DATE OF MINIMUM       1992-02-27 1991-11-07 1991-07-11 1992-08-19 1991-03-07
 10TH PERCENTILE            0.012       0.95      0.012      0.010        20.
 MEDIAN                     0.030       4.20      0.060      0.010        32.
 90TH PERCENTILE            0.054       4.80      0.130      0.020        84.
 MAXIMUM                    0.060       5.00      0.250      0.030       100.
 DATE OF MAXIMUM       1993-12-06 1993-12-06 1992-03-30 1991-01-02 1991-07-11
 STANDARD DEVIATION         0.016       1.56      0.056      0.006        26.



                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       25         25         25          0         12
 MEAN                         14.        1.7     22.800      0.001       0.04
 MINIMUM                       6.        0.8     12.000                  0.00
 DATE OF MINIMUM       1991-03-07 1992-02-27 1991-03-07            1991-05-28
 10TH PERCENTILE               8.        1.2     12.500                  0.00
 MEDIAN                       12.        1.6     21.000                  0.01
 90TH PERCENTILE              20.        2.4     37.000                  0.11
 MAXIMUM                      32.        2.8     41.000                  0.13
 DATE OF MAXIMUM       1991-09-03 1991-08-22 1991-07-11            1992-12-22
 STANDARD DEVIATION            6.        0.5      9.256                  0.05




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        2          0          0          1          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         12          5          4          0
 MEAN                        0.03      0.003      0.002      0.003      0.001
 MINIMUM                     0.00      0.001      0.001      0.001           
 DATE OF MINIMUM       1993-06-17 1992-08-19 1991-03-07 1992-08-19           
 10TH PERCENTILE             0.00      0.001                                 
 MEDIAN                      0.02      0.002      0.002      0.003           
 90TH PERCENTILE             0.05      0.004                                 
 MAXIMUM                     0.08      0.005      0.002      0.005           
 DATE OF MAXIMUM       1993-12-06 1993-12-06 1992-07-09 1991-03-07           
 STANDARD DEVIATION          0.02      0.001      0.001      0.001           




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       12          2          3          3          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         21          0          0          4
 MEAN                       0.001       153.      0.001      0.100      0.001
 MINIMUM                    0.001         0.                            0.000
 DATE OF MINIMUM       1991-03-07 1993-06-17                       1992-07-09
 10TH PERCENTILE            0.001         0.                                 
 MEDIAN                     0.001        32.                            0.001
 90TH PERCENTILE            0.001       374.                                 
 MAXIMUM                    0.001      1330.                            0.001
 DATE OF MAXIMUM       1993-12-06 1991-01-02                       1991-09-03
 STANDARD DEVIATION         0.000       299.                            0.001




                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       40
 MEAN                      1764.5
 MINIMUM                     89.2
 DATE OF MINIMUM       1991-08-06
 10TH PERCENTILE            122.3
 MEDIAN                     877.9
 90TH PERCENTILE           4672.8
 MAXIMUM                   8411.1
 DATE OF MAXIMUM       1993-03-30
 STANDARD DEVIATION        2015.4





 STATION - COLORADO RIVER                           STATION NO. 028006
 COUNTRY - UNITED STATES                            DEPTH(M)       7.7
 LOCATION - OCT. 1  LAT. 36/00/55  LONG. 114/44/16  ELEVATION(M) 196.6
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-09 TO 1993-10-29

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16         16         14         15
 MEAN                       1014.       13.2       0.37       0.02        7.8
 MINIMUM                     900.       11.5       0.30       0.01        5.6
 DATE OF MINIMUM       1991-08-27 1991-02-26 1991-01-09 1991-06-26 1993-10-29
 10TH PERCENTILE             924.       11.8       0.30       0.01        5.9
 MEDIAN                     1015.       13.0       0.40       0.02        7.9
 90TH PERCENTILE            1073.       14.8       0.40       0.03        9.1
 MAXIMUM                    1080.       16.0       0.40       0.03        9.9
 DATE OF MAXIMUM       1992-04-21 1991-10-28 1991-08-27 1991-12-16 1993-02-24
 STANDARD DEVIATION           49.        1.2       0.05       0.01        1.2




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11102      12102      13102
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        0          0          0          0          9
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16         16         16          4
 MEAN                         0.3        7.9        95.        29.      0.011
 MINIMUM                      0.2        7.4        88.        27.      0.008
 DATE OF MINIMUM       1992-02-19 1993-10-29 1991-08-27 1991-08-27 1993-06-22
 10TH PERCENTILE              0.3        7.5        89.        28.      0.009
 MEDIAN                       0.3        7.8        96.        29.      0.010
 90TH PERCENTILE              0.4        8.1        99.        30.      0.010
 MAXIMUM                      0.7        8.7       100.        30.      0.020
 DATE OF MAXIMUM       1991-01-09 1991-02-26 1993-04-23 1992-10-19 1992-08-24
 STANDARD DEVIATION           0.1        0.3         4.         1.      0.003




                               Si          P    P TOTAL   SULPHATE         Cl
                         REACTIVE      TOTAL       DISS                  DISS
                            14101      15405      15417      16303      17203
                         mg/LSiO2     mg/L P     mg/L P   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0         11         13          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16          5          3         16         16
 MEAN                        8.79      0.011      0.010       273.        85.
 MINIMUM                     8.20      0.010      0.010       260.        80.
 DATE OF MINIMUM       1993-06-22 1991-01-09 1991-01-09 1991-12-16 1991-01-09
 10TH PERCENTILE             8.38      0.010      0.010       260.        81.
 MEDIAN                      8.75      0.010      0.010       275.        85.
 90TH PERCENTILE             9.14      0.014      0.010       280.        90.
 MAXIMUM                     9.30      0.020      0.010       290.        91.
 DATE OF MAXIMUM       1991-12-16 1993-04-23 1993-10-29 1993-10-29 1993-02-24
 STANDARD DEVIATION          0.28      0.003      0.000         9.         3.



                                K         Ca         Cr         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            19102      20103      24052      25104      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          2          6          5
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16          3          7          7
 MEAN                         4.5     77.250      0.001       0.00       0.01
 MINIMUM                      3.9     73.000      0.001       0.00       0.00
 DATE OF MINIMUM       1991-06-26 1991-01-09 1991-02-26 1991-02-26 1991-02-26
 10TH PERCENTILE              4.1     73.000                  0.00       0.00
 MEDIAN                       4.4     77.500      0.001       0.00       0.00
 90TH PERCENTILE              4.8     81.400                  0.01       0.01
 MAXIMUM                      4.9     82.000      0.001       0.01       0.02
 DATE OF MAXIMUM       1993-06-22 1992-10-19 1993-06-22 1993-10-29 1991-10-28
 STANDARD DEVIATION           0.3      3.215      0.000       0.00       0.01




                               Ni         Cu         Zn         As         Se
                             DISS       DISS       DISS       DISS       DISS
                            28102      29105      30104      33104      34102
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Se


 NO. OF L-FLAGGED VALUES        8          1          1          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          4          4          5         11
 MEAN                       0.001      0.002      0.011      0.002      0.002
 MINIMUM                    0.001      0.001      0.001      0.002      0.001
 DATE OF MINIMUM       1991-02-26 1991-04-25 1993-06-22 1991-02-26 1991-10-28
 10TH PERCENTILE            0.001                                       0.001
 MEDIAN                     0.001      0.002      0.010      0.002      0.002
 90TH PERCENTILE            0.002                                       0.003
 MAXIMUM                    0.003      0.003      0.021      0.003      0.003
 DATE OF MAXIMUM       1993-06-22 1991-02-26 1991-06-26 1991-06-26 1991-08-27
 STANDARD DEVIATION         0.001      0.001      0.009      0.001      0.001




                         FAEC COL         Cd         Hg         Pb       INST
                                        DISS       DISS       DISS     DISCHG
                            36012      48101      80111      82101      97160
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES       11          3          3          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          2          0          3         16
 MEAN                          2.      0.001      0.100      0.001      421.8
 MINIMUM                       1.      0.001                 0.001       27.5
 DATE OF MINIMUM       1991-01-09 1991-02-26            1991-04-25 1993-02-24
 10TH PERCENTILE               1.                                        90.5
 MEDIAN                        2.      0.001                 0.001      480.0
 90TH PERCENTILE               2.                                       681.6
 MAXIMUM                       2.      0.002                 0.002      762.7
 DATE OF MAXIMUM       1992-02-19 1991-08-27            1991-02-26 1991-06-26
 STANDARD DEVIATION            1.      0.000                 0.000      222.5





 STATION - POTOMAC RIVER                            STATION NO. 028007
 COUNTRY - UNITED STATES                            DEPTH(M)       5.2
 LOCATION - OCT. 0  LAT. 38/55/46  LONG. 077/07/02  ELEVATION(M)   1.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-14 TO 1993-12-07

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP   ORG CARB     NO3NO2        NH3
                             COND                  DISS                      
                            02041      02061      06101      07105      07551
                            us/cm      deg C     mg/L C     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       40         40         10         39         38
 MEAN                        297.       16.2        3.4       1.32       0.04
 MINIMUM                     169.        3.0        1.8       0.40       0.01
 DATE OF MINIMUM       1993-12-07 1993-01-21 1993-05-04 1991-09-10 1991-03-19
 10TH PERCENTILE             183.        4.0        1.8       0.69       0.01
 MEDIAN                      294.       16.0        3.2       1.40       0.04
 90TH PERCENTILE             400.       28.0        4.9       1.70       0.08
 MAXIMUM                     420.       32.0        5.8       1.90       0.21
 DATE OF MAXIMUM       1991-10-29 1993-07-07 1993-12-01 1993-01-21 1993-03-06
 STANDARD DEVIATION           77.        8.9        1.2       0.37       0.04




                               O2          F        ALK         pH         Na
                             DISS       DISS      TOTAL                  DISS
                            08102      09104      10101      10301      11102
                          mg/L O2     mg/L F       mg/L   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES        0          9          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       37         23         12         40         33
 MEAN                        10.4        0.1      83.58        7.9         9.
 MINIMUM                      7.2        0.1      46.00        6.5         4.
 DATE OF MINIMUM       1993-07-20 1991-03-19 1993-03-06 1993-03-06 1993-03-29
 10TH PERCENTILE              7.6        0.1      47.40        7.2         4.
 MEDIAN                      10.3        0.1      79.50        8.1         8.
 90TH PERCENTILE             13.6        0.2     110.90        8.5        16.
 MAXIMUM                     15.8        0.2     127.00        8.9        19.
 DATE OF MAXIMUM       1993-03-06 1991-09-10 1991-10-29 1993-07-07 1991-10-29
 STANDARD DEVIATION           2.5        0.0      23.54        0.5         5.




                               Mg         Al         Si          P    P TOTAL
                             DISS       DISS   REACTIVE      TOTAL       DISS
                            12102      13102      14101      15405      15417
                          mg/L Mg    mg/L Al   mg/LSiO2     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        0          2          0          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       33         19         38         38         36
 MEAN                          8.      0.028       4.50      0.090      0.035
 MINIMUM                       4.      0.009       0.30      0.010      0.010
 DATE OF MINIMUM       1993-03-06 1993-11-16 1991-10-29 1993-06-08 1991-03-19
 10TH PERCENTILE               4.      0.010       0.82      0.020      0.010
 MEDIAN                        8.      0.020       5.40      0.065      0.030
 90TH PERCENTILE              12.      0.039       6.76      0.184      0.060
 MAXIMUM                      13.      0.080       7.90      0.380      0.090
 DATE OF MAXIMUM       1991-10-29 1993-03-09 1993-07-20 1993-03-06 1992-07-06
 STANDARD DEVIATION            3.      0.018       2.35      0.084      0.019




                         SULPHATE         Cl    LINDANE          K         Ca
                                        DISS                  DISS       DISS
                            16303      17203      18070      19102      20103
                         mg/L SO4    mg/L Cl       ug/L     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       33         33          0         33         33
 MEAN                         32.        14.      0.100        2.6     33.424
 MINIMUM                      16.         6.                   1.7     17.000
 DATE OF MINIMUM       1993-03-06 1993-04-20            1991-03-19 1993-03-06
 10TH PERCENTILE              19.         6.                   1.7     20.300
 MEDIAN                       31.        13.                   2.5     33.000
 90TH PERCENTILE              46.        22.                   3.5     46.100
 MAXIMUM                      51.        27.                   4.0     49.000
 DATE OF MAXIMUM       1993-09-14 1991-10-29            1991-10-29 1993-11-01
 STANDARD DEVIATION           10.         6.                   0.7      9.307




                               Cr         Cr         Mn         Fe         Ni
                            TOTAL       DISS       DISS      TOTAL       DISS
                            24002      24052      25104      26004      28102
                          mg/L Cr    mg/L Cr    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          4          1          1          6
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          0         20         22          6
 MEAN                       0.005      0.001       0.01       0.03      0.001
 MINIMUM                               0.001       0.00       0.00      0.001
 DATE OF MINIMUM                  1991-03-19 1993-04-20 1993-09-01 1991-03-19
 10TH PERCENTILE                                   0.00       0.01      0.001
 MEDIAN                                0.001       0.01       0.02      0.001
 90TH PERCENTILE                                   0.01       0.07      0.001
 MAXIMUM                               0.001       0.02       0.11      0.002
 DATE OF MAXIMUM                  1993-11-16 1992-09-01 1992-08-12 1991-10-29
 STANDARD DEVIATION                    0.000       0.01       0.03      0.000




                               Cu         Cu         Zn         Zn         As
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            29006      29105      30004      30104      33003
                          mg/L Cu    mg/L Cu    mg/L Zn    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        1          1          2          1          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          3          0          3          0
 MEAN                       0.002      0.002      0.010      0.007      0.001
 MINIMUM                               0.001                 0.003           
 DATE OF MINIMUM                  1991-03-19            1993-11-16           
 10TH PERCENTILE                                                             
 MEDIAN                                0.002                 0.004           
 90TH PERCENTILE                                                             
 MAXIMUM                               0.003                 0.016           
 DATE OF MAXIMUM                  1991-09-10            1991-05-07           
 STANDARD DEVIATION                    0.001                 0.006           




                               As         Se   FAEC COL         Cd         Cd
                             DISS       DISS                 TOTAL       DISS
                            33104      34102      36012      48001      48101
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    mg/L Cd


 NO. OF L-FLAGGED VALUES        3         12          0          2          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          0         14          0          0
 MEAN                       0.001      0.001       482.      0.001      0.001
 MINIMUM                    0.001      0.001         1.                 0.001
 DATE OF MINIMUM       1991-03-19 1991-03-19 1993-11-16            1991-03-19
 10TH PERCENTILE                       0.001         2.                      
 MEDIAN                     0.001      0.001        68.                 0.001
 90TH PERCENTILE                       0.001       300.                      
 MAXIMUM                    0.001      0.001      5400.                 0.001
 DATE OF MAXIMUM       1993-11-16 1993-11-16 1993-03-09            1993-11-16
 STANDARD DEVIATION         0.000      0.000      1419.                 0.000




                               Ba         Hg         Pb         Pb       INST
                            TOTAL       DISS      TOTAL       DISS     DISCHG
                            80016      80111      82001      82101      97160
                          ug/L Hg    ug/L Hg    mg/L Pb    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        2          3          2          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0          0          0         40
 MEAN                       0.100      0.100      0.001      0.001      648.1
 MINIMUM                                                     0.001        0.4
 DATE OF MINIMUM                                        1991-03-19 1992-03-03
 10TH PERCENTILE                                                         28.6
 MEDIAN                                                      0.001      163.0
 90TH PERCENTILE                                                       1478.3
 MAXIMUM                                                     0.001     5267.5
 DATE OF MAXIMUM                                        1993-11-16 1993-03-06
 STANDARD DEVIATION                                          0.000     1122.5





 STATION - DELAWARE RIVER                           STATION NO. 028008
 COUNTRY - UNITED STATES                            DEPTH(M)       1.4
 LOCATION - OCT. 0  LAT. 40/13/18  LONG. 074/46/42  ELEVATION(M)   3.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-03-07 TO 1993-12-07

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP          B   ORG CARB     NO3NO2
                             COND                 TOTAL       DISS           
                            02041      02061      05001      06101      07105
                            us/cm      deg C     mg/L B     mg/L C     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       41         55          3         11         27
 MEAN                        188.       14.9        0.0        2.8       0.91
 MINIMUM                     109.        0.0        0.0        2.2       0.00
 DATE OF MINIMUM       1992-06-02 1992-03-12 1992-06-29 1992-04-09 1993-11-03
 10TH PERCENTILE             120.        5.0                   2.2       0.60
 MEDIAN                      178.       10.5        0.0        2.8       0.90
 90TH PERCENTILE             248.       25.8                   3.0       1.30
 MAXIMUM                     261.       27.0        0.0        3.9       1.70
 DATE OF MAXIMUM       1993-08-18 1993-08-05 1993-11-03 1991-10-24 1991-11-20
 STANDARD DEVIATION           47.        8.7        0.0        0.5       0.33




                              NH3         O2        BOD          F        ALK
                                        DISS                  DISS      TOTAL
                            07551      08102      08201      09104      10101
                           mg/L N    mg/L O2    mg/L O2     mg/L F       mg/L


 NO. OF L-FLAGGED VALUES        4          0          6         11          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       23         54          8         15         22
 MEAN                        0.05       10.1         1.        0.1      34.27
 MINIMUM                     0.00        0.0         1.        0.1       0.00
 DATE OF MINIMUM       1993-11-03 1992-01-27 1991-03-07 1991-03-07 1991-05-16
 10TH PERCENTILE             0.01        7.3         1.        0.1       0.00
 MEDIAN                      0.03       10.6         1.        0.1      36.00
 90TH PERCENTILE             0.09       13.1         2.        0.2      58.60
 MAXIMUM                     0.25       14.2         2.        0.2      72.00
 DATE OF MAXIMUM       1991-10-24 1992-04-09 1993-11-03 1992-03-28 1993-06-08
 STANDARD DEVIATION          0.05        3.1         0.        0.0      19.69




                               pH         Na         Mg         Al         Si
                                        DISS       DISS       DISS   REACTIVE
                            10301      11102      12102      13102      14101
                         pH UNITS    mg/L Na    mg/L Mg    mg/L Al   mg/LSiO2


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       41         26         26         10         26
 MEAN                         7.8         9.         5.     25.833       3.42
 MINIMUM                      7.3         5.         2.     10.000       0.00
 DATE OF MINIMUM       1991-03-07 1993-11-29 1992-06-02 1991-11-20 1991-11-20
 10TH PERCENTILE              7.4         6.         3.     10.000       1.92
 MEDIAN                       7.7         9.         5.     30.000       3.50
 90TH PERCENTILE              8.5        12.         8.     30.000       4.68
 MAXIMUM                      8.9        14.         8.     50.000       5.20
 DATE OF MAXIMUM       1993-06-08 1991-11-20 1993-08-18 1992-10-22 1993-03-24
 STANDARD DEVIATION           0.4         2.         2.     10.836       1.18




                                P    P TOTAL   SULPHATE         Cl          K
                            TOTAL       DISS                  DISS       DISS
                            15405      15417      16303      17203      19102
                           mg/L P     mg/L P   mg/L SO4    mg/L Cl     mg/L K


 NO. OF L-FLAGGED VALUES        0          4          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       27         23         26         26         26
 MEAN                       0.110      0.044        19.        14.        1.4
 MINIMUM                    0.000      0.000        13.         7.        0.8
 DATE OF MINIMUM       1993-11-03 1993-11-03 1991-03-07 1993-12-07 1992-04-20
 10TH PERCENTILE            0.037      0.010        13.         9.        1.0
 MEDIAN                     0.070      0.030        18.        14.        1.3
 90TH PERCENTILE            0.225      0.070        25.        17.        1.9
 MAXIMUM                    0.460      0.180        28.        19.        2.3
 DATE OF MAXIMUM       1993-11-29 1993-08-18 1991-11-20 1993-08-18 1993-08-18
 STANDARD DEVIATION         0.100      0.039         4.         3.        0.4




                               Ca         Cr         Cr         Mn         Mn
                             DISS      TOTAL       DISS      TOTAL       DISS
                            20103      24002      24052      25004      25104
                          mg/L Ca    mg/L Cr    mg/L Cr    mg/L Mn    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          3          2          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       26          1          1          4         11
 MEAN                      15.208      0.002      0.001       0.05       0.01
 MINIMUM                    9.500      0.001                  0.02       0.00
 DATE OF MINIMUM       1992-06-02 1992-06-29            1992-06-29 1991-11-20
 10TH PERCENTILE            9.960                                        0.00
 MEDIAN                    15.000      0.001                  0.03       0.01
 90TH PERCENTILE           20.400                                        0.01
 MAXIMUM                   24.000      0.003                  0.11       0.02
 DATE OF MAXIMUM       1993-06-08 1993-11-03            1993-11-03 1992-01-27
 STANDARD DEVIATION         3.853      0.001                  0.04       0.01




                               Fe         Fe         Ni         Ni         Cu
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            26004      26104      28001      28102      29006
                          mg/L Fe    mg/L Fe    mg/L Ni    mg/L Ni    mg/L Cu


 NO. OF L-FLAGGED VALUES        0          0          0          5          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12          4          3          7          4
 MEAN                        0.02       0.20      0.002      0.001      0.003
 MINIMUM                     0.00       0.07                 0.001      0.002
 DATE OF MINIMUM       1993-06-08 1993-06-08            1991-03-07 1993-06-08
 10TH PERCENTILE             0.00                            0.001           
 MEDIAN                      0.02       0.12                 0.001      0.003
 90TH PERCENTILE             0.03                            0.002           
 MAXIMUM                     0.03       0.50                 0.002      0.004
 DATE OF MAXIMUM       1993-11-17 1993-11-03            1992-08-13 1992-10-22
 STANDARD DEVIATION          0.01       0.20                 0.000      0.001




                               Cu         Zn         Zn         As         As
                             DISS      TOTAL       DISS      TOTAL       DISS
                            29105      30004      30104      33003      33104
                          mg/L Cu    mg/L Zn    mg/L Zn    mg/L As    mg/L As


 NO. OF L-FLAGGED VALUES        0          0          0          4          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          4          3          0          1
 MEAN                       0.003      0.030      0.010      0.001      0.001
 MINIMUM                               0.010                 0.001           
 DATE OF MINIMUM                  1992-10-22            1992-06-29           
 10TH PERCENTILE                                                             
 MEDIAN                                0.025                 0.001           
 90TH PERCENTILE                                                             
 MAXIMUM                               0.060                 0.001           
 DATE OF MAXIMUM                  1993-11-03            1993-11-03           
 STANDARD DEVIATION                    0.022                 0.000           




                               Se         Se   FAEC COL         Cd         Cd
                            TOTAL       DISS                 TOTAL       DISS
                            34002      34102      36012      48001      48101
                          mg/L Se    mg/L Se   No/100ml    mg/L Cd    mg/L Cd


 NO. OF L-FLAGGED VALUES        4         12          0          4          3
 NO. OF G-FLAGGED VALUES        0          0          1          0          0
 NO. OF UNFLAGGED VALUES        0          0         10          0          0
 MEAN                       0.001      0.001        87.      0.001      0.001
 MINIMUM                    0.001      0.001         7.      0.001           
 DATE OF MINIMUM       1992-06-29 1991-03-07 1992-01-27 1992-06-29           
 10TH PERCENTILE                       0.001         7.                      
 MEDIAN                     0.001      0.001        19.      0.001           
 90TH PERCENTILE                       0.001       184.                      
 MAXIMUM                    0.001      0.001       600.      0.001           
 DATE OF MAXIMUM       1993-11-03 1993-11-17 1993-08-18 1993-11-03           
 STANDARD DEVIATION         0.000      0.000       179.      0.000           




                               Ba         Hg         Pb         Pb       INST
                            TOTAL       DISS      TOTAL       DISS     DISCHG
                            80016      80111      82001      82101      97160
                          ug/L Hg    ug/L Hg    mg/L Pb    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        2          3          2          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          0          2          1         24
 MEAN                       0.150      0.100      0.002      0.001      509.0
 MINIMUM                    0.100                 0.001                  71.9
 DATE OF MINIMUM       1992-06-29            1992-06-29            1991-08-09
 10TH PERCENTILE                                                         86.7
 MEDIAN                     0.150                 0.001                 320.9
 90TH PERCENTILE                                                       1185.2
 MAXIMUM                    0.200                 0.003                1489.6
 DATE OF MAXIMUM       1993-11-03            1993-11-03            1993-03-29
 STANDARD DEVIATION         0.058                 0.001                 429.3





 STATION - OHIO RIVER                               STATION NO. 028009
 COUNTRY - UNITED STATES                            DEPTH(M)      11.2
 LOCATION - OCT. 0  LAT. 37/12/13  LONG. 089/02/27  ELEVATION(M)  94.3
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-02-06 TO 1993-12-07

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP          B          B   ORG CARB
                             COND                 TOTAL       DISS       DISS
                            02041      02061      05001      05101      06101
                            us/cm      deg C     mg/L B     mg/L B     mg/L C


 NO. OF L-FLAGGED VALUES        0          0          1          1          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       70         72          0          0          5
 MEAN                        252.       19.4        0.1        0.1        0.4
 MINIMUM                       0.        3.5                              0.0
 DATE OF MINIMUM       1991-06-04 1992-01-21                       1991-05-01
 10TH PERCENTILE             191.        7.6                                 
 MEDIAN                      248.       20.2                              0.0
 90TH PERCENTILE             321.       29.0                                 
 MAXIMUM                     368.       31.0                              2.6
 DATE OF MAXIMUM       1992-05-06 1991-07-22                       1991-10-07
 STANDARD DEVIATION           64.        8.2                              1.1




                           NO3NO2        NH3         O2          F         pH
                                                   DISS       DISS           
                            07105      07551      08102      09104      10301
                           mg/L N     mg/L N    mg/L O2     mg/L F   pH UNITS


 NO. OF L-FLAGGED VALUES        0          4          0          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       69         65         17         14         71
 MEAN                        0.95       0.04       10.2        0.1        7.2
 MINIMUM                     0.20       0.01        6.6        0.1        5.5
 DATE OF MINIMUM       1991-08-20 1991-04-02 1991-06-04 1991-02-06 1992-01-02
 10TH PERCENTILE             0.30       0.01        6.6        0.1        6.2
 MEDIAN                      1.00       0.03       10.7        0.1        7.3
 90TH PERCENTILE             1.51       0.07       13.0        0.2        7.9
 MAXIMUM                     2.40       0.11       13.1        0.3        8.5
 DATE OF MAXIMUM       1992-04-28 1993-08-19 1993-02-02 1992-06-02 1991-04-10
 STANDARD DEVIATION          0.49       0.02        2.3        0.1        0.7




                               Na         Mg         Al         Al         Si
                             DISS       DISS      TOTAL       DISS   REACTIVE
                            11102      12102      13002      13102      14101
                          mg/L Na    mg/L Mg    mg/L Al    mg/L Al   mg/LSiO2


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16          1         13         17
 MEAN                         10.         9.      1.367     30.731       4.48
 MINIMUM                       6.         7.                 0.010       0.80
 DATE OF MINIMUM       1991-04-02 1991-04-02            1993-06-10 1991-08-05
 10TH PERCENTILE               6.         7.                 0.018       1.50
 MEDIAN                       11.         9.                30.000       5.40
 90TH PERCENTILE              13.        11.                80.000       6.03
 MAXIMUM                      13.        12.                80.000       6.30
 DATE OF MAXIMUM       1993-06-10 1993-06-10            1991-06-04 1993-02-02
 STANDARD DEVIATION            2.         2.                31.475       1.72



                                P    P TOTAL   SULPHATE         Cl    LINDANE
                            TOTAL       DISS                  DISS           
                            15405      15417      16303      17203      18070
                           mg/L P     mg/L P   mg/L SO4    mg/L Cl       ug/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       63         17         17         17          0
 MEAN                       0.097      0.047        41.        14.      0.100
 MINIMUM                    0.020      0.020        31.         9.           
 DATE OF MINIMUM       1992-05-18 1992-04-07 1991-08-05 1991-04-02           
 10TH PERCENTILE            0.050      0.027        33.         9.           
 MEDIAN                     0.080      0.040        39.        13.           
 90TH PERCENTILE            0.170      0.063        49.        18.           
 MAXIMUM                    0.320      0.080        56.        19.           
 DATE OF MAXIMUM       1991-08-05 1991-06-04 1993-06-10 1991-10-07           
 STANDARD DEVIATION         0.055      0.015         6.         3.           




                                K         Ca         Cr         Cr         Mn
                             DISS       DISS      TOTAL       DISS      TOTAL
                            19102      20103      24002      24052      25004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          1          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16          0          2          1
 MEAN                         2.4     34.188      0.005      0.002       0.18
 MINIMUM                      1.7     24.000                 0.001           
 DATE OF MINIMUM       1992-02-04 1991-10-07            1991-04-02           
 10TH PERCENTILE              1.8     27.600                                 
 MEDIAN                       2.2     35.000                 0.002           
 90TH PERCENTILE              2.9     39.000                                 
 MAXIMUM                      3.4     41.000                 0.004           
 DATE OF MAXIMUM       1993-10-13 1993-06-10            1991-06-04           
 STANDARD DEVIATION           0.5      4.199                 0.002           




                               Mn         Fe         Fe         Ni         Ni
                             DISS      TOTAL       DISS      TOTAL       DISS
                            25104      26004      26104      28001      28102
                          mg/L Mn    mg/L Fe    mg/L Fe    mg/L Ni    mg/L Ni


 NO. OF L-FLAGGED VALUES        2          0          0          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         14          1          1         11
 MEAN                        0.00       0.04       2.44      0.014      0.002
 MINIMUM                     0.00       0.01                            0.001
 DATE OF MINIMUM       1991-04-02 1992-10-20                       1991-02-06
 10TH PERCENTILE             0.00       0.01                            0.001
 MEDIAN                      0.00       0.05                            0.002
 90TH PERCENTILE             0.01       0.07                            0.002
 MAXIMUM                     0.02       0.09                            0.003
 DATE OF MAXIMUM       1991-02-06 1993-04-14                       1992-10-20
 STANDARD DEVIATION          0.01       0.02                            0.001




                               Cu         Cu         Zn         Zn         As
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            29006      29105      30004      30104      33003
                          mg/L Cu    mg/L Cu    mg/L Zn    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        1          1          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          3          1          3          1
 MEAN                       0.005      0.003      0.110      0.008      0.002
 MINIMUM                               0.002                 0.004           
 DATE OF MINIMUM                  1991-04-02            1991-04-02           
 10TH PERCENTILE                                                             
 MEDIAN                                0.002                 0.007           
 90TH PERCENTILE                                                             
 MAXIMUM                               0.005                 0.013           
 DATE OF MAXIMUM                  1991-06-04            1991-06-04           
 STANDARD DEVIATION                    0.001                 0.005           




                               As         Se   FAEC COL         Cd         Cd
                             DISS       DISS                 TOTAL       DISS
                            33104      34102      36012      48001      48101
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    mg/L Cd


 NO. OF L-FLAGGED VALUES        4         14          0          1          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0         16          0          1
 MEAN                       0.001      0.001        76.      0.003      0.001
 MINIMUM                    0.001      0.001         2.                 0.001
 DATE OF MINIMUM       1991-02-06 1991-02-06 1992-02-04            1991-02-06
 10TH PERCENTILE                       0.001         6.                      
 MEDIAN                     0.001      0.001        67.                 0.001
 90TH PERCENTILE                       0.001       126.                      
 MAXIMUM                    0.001      0.001       320.                 0.001
 DATE OF MAXIMUM       1991-06-04 1993-12-07 1993-12-07            1991-06-04
 STANDARD DEVIATION         0.000      0.000        75.                 0.000




                               Ba         Hg         Pb         Pb       INST
                            TOTAL       DISS      TOTAL       DISS     DISCHG
                            80016      80111      82001      82101      97160
                          ug/L Hg    ug/L Hg    mg/L Pb    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        1          4          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0          1          3         62
 MEAN                       0.050      0.100      0.006      0.001     8034.0
 MINIMUM                               0.100                 0.001     1727.5
 DATE OF MINIMUM                  1991-02-06            1991-04-02 1991-10-07
 10TH PERCENTILE                                                       3041.5
 MEDIAN                                0.100                 0.001     6173.8
 90TH PERCENTILE                                                      15915.8
 MAXIMUM                               0.100                 0.002    24242.0
 DATE OF MAXIMUM                  1991-06-04            1991-02-06 1991-04-02
 STANDARD DEVIATION                    0.000                 0.001     5393.3





 STATION - RIO GRANDE                               STATION NO. 028010
 COUNTRY - UNITED STATES                            DEPTH(M)       1.9
 LOCATION - OCT. 1  LAT. 25/52/35  LONG. 097/27/15  ELEVATION(M)   2.7
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-08 TO 1993-11-17

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          4          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14         14         10         13         14
 MEAN                       1457.       23.0       0.20       0.06        8.2
 MINIMUM                     998.       13.0       0.05       0.01        6.3
 DATE OF MINIMUM       1991-07-10 1991-01-08 1991-05-02 1991-05-02 1991-09-04
 10TH PERCENTILE            1031.       13.6       0.05       0.01        6.3
 MEDIAN                     1410.       24.2       0.20       0.03        7.9
 90TH PERCENTILE            1818.       28.8       0.40       0.15        9.8
 MAXIMUM                    2060.       30.0       0.50       0.27       10.3
 DATE OF MAXIMUM       1991-03-06 1992-08-26 1991-01-08 1993-01-12 1991-03-06
 STANDARD DEVIATION          346.        5.7       0.15       0.08        1.3




                              BOD          F         pH         Na        SAR
                                        DISS                  DISS           
                            08201      09104      10301      11102      11201
                          mg/L O2     mg/L F   pH UNITS    mg/L Na   REL.UNIT


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14         13         14         13          1
 MEAN                          3.        0.7        8.1       168.      0.000
 MINIMUM                       1.        0.5        7.7       120.           
 DATE OF MINIMUM       1992-02-11 1991-01-08 1993-01-12 1991-07-10           
 10TH PERCENTILE               1.        0.5        7.8       120.           
 MEDIAN                        3.        0.7        8.0       150.           
 90TH PERCENTILE               5.        0.8        8.3       210.           
 MAXIMUM                       5.        0.9        8.4       270.           
 DATE OF MAXIMUM       1992-10-14 1991-03-06 1992-08-26 1991-03-06           
 STANDARD DEVIATION            2.        0.1        0.2        45.           




                               Mg         Al         Si          P    P TOTAL
                             DISS       DISS   REACTIVE      TOTAL       DISS
                            12102      13102      14101      15405      15417
                          mg/L Mg    mg/L Al   mg/LSiO2     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        0          3          0          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13          5         13         14         11
 MEAN                         26.     18.750      15.08      0.106      0.032
 MINIMUM                      14.     10.000      13.00      0.030      0.010
 DATE OF MINIMUM       1991-07-10 1991-10-22 1991-07-10 1991-03-06 1991-07-10
 10TH PERCENTILE              15.                 13.00      0.038      0.010
 MEDIAN                       22.     15.000      14.00      0.115      0.030
 90TH PERCENTILE              36.                 17.70      0.140      0.057
 MAXIMUM                      40.     40.000      19.00      0.160      0.060
 DATE OF MAXIMUM       1991-03-06 1991-03-06 1991-05-02 1993-01-12 1991-09-04
 STANDARD DEVIATION            9.     11.260       1.98      0.035      0.019




                         SULPHATE         Cl          K         Ca         Cr
                                        DISS       DISS       DISS       DISS
                            16303      17203      19102      20103      24052
                         mg/L SO4    mg/L Cl     mg/L K    mg/L Ca    mg/L Cr


 NO. OF L-FLAGGED VALUES        0          0          0          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13         13         13          1
 MEAN                        295.       194.        6.3     95.846      0.001
 MINIMUM                     200.       120.        4.9     63.000           
 DATE OF MINIMUM       1991-07-10 1991-07-10 1991-07-10 1991-07-10           
 10TH PERCENTILE             212.       120.        5.0     66.000           
 MEDIAN                      280.       160.        6.1     82.000           
 90TH PERCENTILE             375.       271.        7.2    120.000           
 MAXIMUM                     440.       340.        8.7    130.000           
 DATE OF MAXIMUM       1991-03-06 1991-03-06 1991-03-06 1991-05-02           
 STANDARD DEVIATION           69.        70.        1.0     24.027           




                               Mn         Fe         Ni         Cu         Zn
                             DISS      TOTAL       DISS       DISS       DISS
                            25104      26004      28102      29105      30104
                          mg/L Mn    mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES        4          1          4          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          7          4          3          2
 MEAN                        0.00       0.01      0.001      0.002      0.014
 MINIMUM                     0.00       0.00      0.001                      
 DATE OF MINIMUM       1991-05-02 1992-10-14 1991-03-06                      
 10TH PERCENTILE                                                             
 MEDIAN                      0.00       0.01      0.001                      
 90TH PERCENTILE                                                             
 MAXIMUM                     0.01       0.03      0.002                      
 DATE OF MAXIMUM       1991-03-06 1991-03-06 1991-10-22                      
 STANDARD DEVIATION          0.00       0.01      0.000                      




                               As         Se   FAEC COL         Cd         Hg
                             DISS       DISS                  DISS       DISS
                            33104      34102      36012      48101      80111
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    ug/L Hg


 NO. OF L-FLAGGED VALUES        0          8          0          3          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          0         13          0          1
 MEAN                       0.005      0.001      1418.      0.001      0.100
 MINIMUM                               0.001        76.                      
 DATE OF MINIMUM                  1991-03-06 1992-02-11                      
 10TH PERCENTILE                                    77.                      
 MEDIAN                                0.001       560.                      
 90TH PERCENTILE                                  1880.                      
 MAXIMUM                               0.001     10000.                      
 DATE OF MAXIMUM                  1992-10-14 1991-09-04                      
 STANDARD DEVIATION                    0.000      2653.                      




                               Pb       INST
                             DISS     DISCHG
                            82101      97160
                          mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        3          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0         18
 MEAN                       0.001       31.6
 MINIMUM                                 0.3
 DATE OF MINIMUM                  1991-05-02
 10TH PERCENTILE                         1.5
 MEDIAN                                  8.7
 90TH PERCENTILE                        70.5
 MAXIMUM                               189.2
 DATE OF MAXIMUM                  1992-06-10
 STANDARD DEVIATION                     57.7





 STATION - SACRAMENTO RIVER                         STATION NO. 028011
 COUNTRY - UNITED STATES                            DEPTH(M)       5.8
 LOCATION - OCT. 1  LAT. 38/27/20  LONG. 121/30/07  ELEVATION(M)   1.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-03-06 TO 1993-12-15

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       44         55         14         12         44
 MEAN                        149.       14.8       0.21       0.03        9.5
 MINIMUM                     103.        7.0       0.07       0.01        7.9
 DATE OF MINIMUM       1993-06-24 1993-01-14 1991-09-10 1991-09-10 1991-06-11
 10TH PERCENTILE             105.        9.2       0.07       0.01        7.9
 MEDIAN                      138.       11.8       0.10       0.03        9.3
 90TH PERCENTILE             192.       23.5       0.40       0.05       10.7
 MAXIMUM                     265.       24.0       0.50       0.05       10.8
 DATE OF MAXIMUM       1992-03-16 1991-06-11 1992-12-16 1992-12-16 1992-12-16
 STANDARD DEVIATION           38.        5.6       0.16       0.01        0.9




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10101      10301      11102      12102
                           mg/L F       mg/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        9          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          1         44         14         14
 MEAN                         0.1       0.03        7.7        10.         7.
 MINIMUM                      0.1                   7.2         5.         4.
 DATE OF MINIMUM       1991-03-11            1992-12-16 1993-06-24 1993-06-24
 10TH PERCENTILE              0.1                   7.3         6.         4.
 MEDIAN                       0.1                   7.7         9.         6.
 90TH PERCENTILE              0.1                   7.9        16.         9.
 MAXIMUM                      0.1                   8.0        18.        10.
 DATE OF MAXIMUM       1993-12-15            1993-03-16 1992-03-16 1992-03-16
 STANDARD DEVIATION           0.0                   0.2         4.         2.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        7          0          2          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         14         12         12         14
 MEAN                       0.016      17.14      0.054      0.032         9.
 MINIMUM                    0.010      15.00      0.010      0.010         4.
 DATE OF MINIMUM       1991-03-11 1992-06-16 1992-06-16 1992-06-16 1993-06-24
 10TH PERCENTILE            0.010      15.00      0.010      0.010         5.
 MEDIAN                     0.010      17.00      0.060      0.030         7.
 90TH PERCENTILE            0.020      19.00      0.080      0.045        16.
 MAXIMUM                    0.050      19.00      0.120      0.070        18.
 DATE OF MAXIMUM       1992-12-16 1992-03-16 1992-12-16 1992-12-16 1992-03-16
 STANDARD DEVIATION         0.011       1.41      0.030      0.015         5.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14         14         14          1         14
 MEAN                          8.        1.4     13.014      0.001       0.00
 MINIMUM                       4.        0.9      9.200                  0.00
 DATE OF MINIMUM       1993-06-24 1991-09-10 1993-06-24            1991-03-11
 10TH PERCENTILE               4.        0.9      9.520                  0.00
 MEDIAN                        8.        1.4     13.000                  0.00
 90TH PERCENTILE              12.        2.0     16.500                  0.01
 MAXIMUM                      15.        2.2     18.000                  0.01
 DATE OF MAXIMUM       1992-03-16 1992-12-16 1992-03-16            1992-12-16
 STANDARD DEVIATION            3.        0.4      2.724                  0.00




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        0         10          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14          4          3          2          3
 MEAN                        0.04      0.001      0.003      0.013      0.002
 MINIMUM                     0.01      0.001                                 
 DATE OF MINIMUM       1991-09-10 1991-03-11                                 
 10TH PERCENTILE             0.01      0.001                                 
 MEDIAN                      0.02      0.001                                 
 90TH PERCENTILE             0.05      0.001                                 
 MAXIMUM                     0.13      0.002                                 
 DATE OF MAXIMUM       1992-12-16 1992-12-16                                 
 STANDARD DEVIATION          0.03      0.000                                 




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       14          0          3          3          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         14          0          0          0
 MEAN                       0.001       119.      0.001      0.100      0.001
 MINIMUM                    0.001         2.                                 
 DATE OF MINIMUM       1991-03-11 1991-09-10                                 
 10TH PERCENTILE            0.001         3.                                 
 MEDIAN                     0.001        67.                                 
 90TH PERCENTILE            0.001       326.                                 
 MAXIMUM                    0.001       410.                                 
 DATE OF MAXIMUM       1993-12-15 1992-06-16                                 
 STANDARD DEVIATION         0.000       142.                                 




                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       30
 MEAN                      1169.2
 MINIMUM                    221.7
 DATE OF MINIMUM       1991-12-18
 10TH PERCENTILE            328.5
 MEDIAN                     664.1
 90TH PERCENTILE           1370.7
 MAXIMUM                  11648.0
 DATE OF MAXIMUM       1993-01-14
 STANDARD DEVIATION        2034.4





 STATION - ARKANSAS RIVER                           STATION NO. 028012
 COUNTRY - UNITED STATES                            DEPTH(M)       5.3
 LOCATION - OCT. 1  LAT. 34/40/07  LONG. 092/09/18  ELEVATION(M)  70.4
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-02-28 TO 1993-12-15

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       32         44         12         12         44
 MEAN                        286.       17.3       0.34       0.05        9.0
 MINIMUM                     155.        2.0       0.10       0.02        6.7
 DATE OF MINIMUM       1991-12-11 1992-01-21 1991-09-04 1993-04-22 1992-05-19
 10TH PERCENTILE             229.        7.7       0.12       0.02        6.9
 MEDIAN                      242.       17.6       0.35       0.05        8.5
 90TH PERCENTILE             420.       27.2       0.50       0.07       11.5
 MAXIMUM                     660.       31.0       0.50       0.10       13.2
 DATE OF MAXIMUM       1993-07-28 1993-07-28 1993-12-15 1991-05-23 1993-01-27
 STANDARD DEVIATION          109.        6.6       0.13       0.02        1.6




                              BOD          F         pH         Na         Mg
                                        DISS                  DISS       DISS
                            08201      09104      10301      11102      12102
                          mg/L O2     mg/L F   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        0          1          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         10         43         11         11
 MEAN                          1.        0.1        7.5        33.         6.
 MINIMUM                       1.        0.1        6.8        11.         3.
 DATE OF MINIMUM       1991-11-12 1991-02-28 1992-03-03 1991-12-11 1991-12-11
 10TH PERCENTILE               1.        0.1        7.3        11.         3.
 MEDIAN                        1.        0.1        7.3        32.         6.
 90TH PERCENTILE               2.        0.2        8.1        53.        10.
 MAXIMUM                       3.        0.2        8.6        67.        10.
 DATE OF MAXIMUM       1991-10-08 1991-12-11 1991-10-08 1991-09-04 1993-07-28
 STANDARD DEVIATION            1.        0.1        0.4        17.         2.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        1          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6         11         23         12         22
 MEAN                       0.054       4.71      0.101      0.036        34.
 MINIMUM                    0.010       1.60      0.060      0.020        13.
 DATE OF MINIMUM       1993-07-28 1991-09-04 1992-04-07 1991-04-15 1991-12-11
 10TH PERCENTILE                        1.76      0.063      0.020        16.
 MEDIAN                     0.070       5.20      0.100      0.035        35.
 90TH PERCENTILE                        6.67      0.126      0.050        50.
 MAXIMUM                    0.090       6.70      0.140      0.060        55.
 DATE OF MAXIMUM       1992-03-23 1993-06-28 1991-04-15 1993-01-27 1993-07-28
 STANDARD DEVIATION         0.030       1.82      0.021      0.013        13.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0         13          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       23         11         11          2          6
 MEAN                         60.        2.4     26.636      0.001       0.01
 MINIMUM                      14.        1.8     12.000      0.001       0.00
 DATE OF MINIMUM       1991-12-10 1991-04-15 1991-12-11 1991-02-28 1991-02-28
 10TH PERCENTILE              17.        1.8     12.500      0.001           
 MEDIAN                       59.        2.4     24.000      0.001       0.01
 90TH PERCENTILE             110.        2.7     34.000      0.001           
 MAXIMUM                     110.        3.1     51.000      0.003       0.01
 DATE OF MAXIMUM       1992-03-03 1993-06-28 1993-07-28 1991-10-08 1992-03-23
 STANDARD DEVIATION           32.        0.4     10.773      0.001       0.01




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        0          3         11          9          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          4          3          4          1
 MEAN                        0.08      0.001      0.021      0.015      0.001
 MINIMUM                     0.01      0.001      0.002      0.006           
 DATE OF MINIMUM       1993-07-28 1991-02-28 1991-02-28 1991-02-28           
 10TH PERCENTILE                                  0.002      0.007           
 MEDIAN                      0.06      0.001      0.025      0.008           
 90TH PERCENTILE                                  0.025      0.018           
 MAXIMUM                     0.18      0.002      0.025      0.081           
 DATE OF MAXIMUM       1992-03-23 1992-03-23 1992-09-08 1991-05-23           
 STANDARD DEVIATION          0.07      0.000      0.009      0.020           




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        6          0         13          3         13
 NO. OF G-FLAGGED VALUES        0          1          0          0          0
 NO. OF UNFLAGGED VALUES        1         10          1          0          2
 MEAN                       0.002       290.      0.001      0.100      0.002
 MINIMUM                    0.001        16.      0.001                 0.001
 DATE OF MINIMUM       1991-02-28 1991-05-23 1991-09-04            1991-02-28
 10TH PERCENTILE                         17.      0.001                 0.001
 MEDIAN                     0.001        86.      0.001                 0.002
 90TH PERCENTILE                        648.      0.001                 0.002
 MAXIMUM                    0.007      1100.      0.002                 0.002
 DATE OF MAXIMUM       1993-07-28 1991-04-15 1991-02-28            1992-09-08
 STANDARD DEVIATION         0.002       348.      0.000                 0.000



                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       11
 MEAN                      2164.2
 MINIMUM                    186.9
 DATE OF MINIMUM       1991-09-04
 10TH PERCENTILE            209.8
 MEDIAN                    1753.0
 90TH PERCENTILE           4426.5
 MAXIMUM                   4559.5
 DATE OF MAXIMUM       1993-04-22
 STANDARD DEVIATION        1606.1





 STATION - DISMAL RIVER                             STATION NO. 028013
 COUNTRY - UNITED STATES                            DEPTH(M)       0.5
 LOCATION - OCT. 1  LAT. 41/46/45  LONG. 100/31/30  ELEVATION(M) 854.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-02-12 TO 1993-11-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP   ORG CARB     NO3NO2        NH3
                             COND                  DISS                      
                            02041      02061      06101      07105      07551
                            us/cm      deg C     mg/L C     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13          4         15         12
 MEAN                        175.       14.0        1.9       0.47       0.02
 MINIMUM                     151.        3.0        1.4       0.40       0.00
 DATE OF MINIMUM       1993-07-08 1993-02-23 1993-06-10 1991-05-10 1992-08-18
 10TH PERCENTILE             158.        3.9                  0.40       0.00
 MEDIAN                      175.       17.0        1.9       0.40       0.02
 90TH PERCENTILE             181.       21.4                  0.60       0.03
 MAXIMUM                     185.       22.0        2.4       0.60       0.04
 DATE OF MAXIMUM       1993-05-03 1993-08-24 1993-11-16 1993-06-10 1991-08-07
 STANDARD DEVIATION            8.        6.9        0.6       0.08       0.01




                               O2          F         pH         Na         Mg
                             DISS       DISS                  DISS       DISS
                            08102      09104      10301      11102      12102
                          mg/L O2     mg/L F   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13         13         13         13
 MEAN                         9.2        0.3        8.1         7.         3.
 MINIMUM                      7.4        0.2        7.5         6.         3.
 DATE OF MINIMUM       1993-07-08 1991-02-12 1993-02-23 1992-08-18 1991-02-12
 10TH PERCENTILE              7.4        0.2        7.6         6.         3.
 MEDIAN                       8.8        0.3        8.2         7.         3.
 90TH PERCENTILE             11.0        0.4        8.4         8.         4.
 MAXIMUM                     11.8        0.4        8.5         8.         4.
 DATE OF MAXIMUM       1993-02-23 1992-05-13 1992-02-18 1993-11-16 1993-08-24
 STANDARD DEVIATION           1.5        0.1        0.3         1.         0.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8         13         14         14         13
 MEAN                       0.032      56.08      0.205      0.132         6.
 MINIMUM                    0.010      53.00      0.050      0.030         5.
 DATE OF MINIMUM       1991-02-12 1992-02-18 1993-06-10 1993-06-10 1992-02-18
 10TH PERCENTILE            0.010      53.00      0.082      0.062         5.
 MEDIAN                     0.020      56.00      0.195      0.135         6.
 90TH PERCENTILE            0.068      58.70      0.230      0.160         7.
 MAXIMUM                    0.080      60.00      0.510      0.170         9.
 DATE OF MAXIMUM       1993-11-16 1992-08-18 1993-07-08 1993-07-08 1991-11-07
 STANDARD DEVIATION         0.024       2.14      0.101      0.034         1.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          1          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13         13          2         12
 MEAN                          1.        5.0     22.846      0.001       0.00
 MINIMUM                       0.        4.5     21.000                  0.00
 DATE OF MINIMUM       1991-08-07 1992-08-18 1992-08-18            1991-02-12
 10TH PERCENTILE               0.        4.6     21.300                  0.00
 MEDIAN                        1.        5.1     23.000                  0.00
 90TH PERCENTILE               2.        5.2     23.700                  0.00
 MAXIMUM                       2.        5.3     25.000                  0.01
 DATE OF MAXIMUM       1991-11-07 1993-11-16 1993-05-03            1992-08-18
 STANDARD DEVIATION            0.        0.2      0.987                  0.00




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        1          9          1          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12          2          2          2          3
 MEAN                        0.02      0.001      0.001      0.007      0.006
 MINIMUM                     0.01      0.001                                 
 DATE OF MINIMUM       1991-02-12 1991-02-12                                 
 10TH PERCENTILE             0.01      0.001                                 
 MEDIAN                      0.02      0.001                                 
 90TH PERCENTILE             0.03      0.001                                 
 MAXIMUM                     0.04      0.002                                 
 DATE OF MAXIMUM       1993-08-24 1991-05-10                                 
 STANDARD DEVIATION          0.01      0.000                                 




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       10          0          3          3          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1         10          0          0          0
 MEAN                       0.001        99.      0.001      0.100      0.001
 MINIMUM                    0.001        11.                                 
 DATE OF MINIMUM       1991-02-12 1993-02-23                                 
 10TH PERCENTILE            0.001        11.                                 
 MEDIAN                     0.001        70.                                 
 90TH PERCENTILE            0.001       180.                                 
 MAXIMUM                    0.001       270.                                 
 DATE OF MAXIMUM       1993-11-16 1991-02-12                                 
 STANDARD DEVIATION         0.000        83.                                 



                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       13
 MEAN                         5.8
 MINIMUM                      5.3
 DATE OF MINIMUM       1993-08-24
 10TH PERCENTILE              5.3
 MEDIAN                       5.8
 90TH PERCENTILE              6.1
 MAXIMUM                      7.0
 DATE OF MAXIMUM       1993-07-08
 STANDARD DEVIATION           0.4





 STATION - APALACHICOLA RIVER                       STATION NO. 028014
 COUNTRY - UNITED STATES                            DEPTH(M)       5.7
 LOCATION - OCT. 0  LAT. 30/42/03  LONG. 084/51/33  ELEVATION(M)  14.8
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-30 TO 1993-12-01

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         12         11         10         12
 MEAN                        115.       20.6       0.35       0.03        8.9
 MINIMUM                      78.        9.5       0.20       0.01        6.0
 DATE OF MINIMUM       1993-03-24 1992-01-21 1993-08-06 1991-11-14 1993-08-06
 10TH PERCENTILE              79.        9.6       0.21       0.01        6.0
 MEDIAN                      118.       21.0       0.40       0.03        9.1
 90TH PERCENTILE             135.       28.3       0.40       0.04       11.2
 MAXIMUM                     139.       30.0       0.40       0.05       12.8
 DATE OF MAXIMUM       1991-11-14 1993-08-06 1991-05-22 1993-08-06 1992-01-21
 STANDARD DEVIATION           20.        7.4       0.07       0.01        2.1




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11102      12102      13102
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        6          0          0          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6         12         12         12         10
 MEAN                         0.1        7.7         7.         1.      0.047
 MINIMUM                      0.1        7.3         4.         1.      0.010
 DATE OF MINIMUM       1991-08-12 1993-03-24 1993-03-24 1991-01-30 1991-08-12
 10TH PERCENTILE              0.1        7.3         4.         1.      0.010
 MEDIAN                       0.1        7.8         6.         1.      0.025
 90TH PERCENTILE              0.2        8.0         9.         2.      0.064
 MAXIMUM                      0.2        8.1        10.         2.      0.220
 DATE OF MAXIMUM       1991-05-22 1992-05-22 1993-12-01 1993-12-01 1991-05-22
 STANDARD DEVIATION           0.0        0.2         2.         0.      0.058




                               Si          P    P TOTAL   SULPHATE         Cl
                         REACTIVE      TOTAL       DISS                  DISS
                            14101      15405      15417      16303      17203
                         mg/LSiO2     mg/L P     mg/L P   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          1          7          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         10          4         12         12
 MEAN                        6.18      0.034      0.012         8.         5.
 MINIMUM                     4.20      0.010      0.010         5.         4.
 DATE OF MINIMUM       1991-11-14 1993-08-06 1991-01-30 1991-08-12 1991-08-12
 10TH PERCENTILE             4.42      0.011      0.010         5.         4.
 MEDIAN                      6.20      0.030      0.010         7.         5.
 90TH PERCENTILE             7.04      0.058      0.019        11.         6.
 MAXIMUM                     7.30      0.060      0.020        14.         7.
 DATE OF MAXIMUM       1991-05-22 1992-01-21 1992-11-13 1993-12-01 1991-01-30
 STANDARD DEVIATION          0.87      0.016      0.004         3.         1.




                                K         Ca         Cr         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            19102      20103      24052      25104      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         12          2         12         12
 MEAN                         1.6     13.233      0.001       0.01       0.12
 MINIMUM                      1.0      7.400                  0.00       0.01
 DATE OF MINIMUM       1992-05-22 1992-11-13            1991-08-12 1992-08-17
 10TH PERCENTILE              1.0      7.700                  0.00       0.01
 MEDIAN                       1.5     12.500                  0.01       0.07
 90TH PERCENTILE              2.2     17.700                  0.02       0.26
 MAXIMUM                      2.4     18.000                  0.04       0.31
 DATE OF MAXIMUM       1993-12-01 1992-05-22            1993-08-06 1991-05-22
 STANDARD DEVIATION           0.4      3.858                  0.01       0.11




                               Ni         Cu         Zn         As         Se
                             DISS       DISS       DISS       DISS       DISS
                            28102      29105      30104      33104      34102
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Se


 NO. OF L-FLAGGED VALUES       11          0          2          3         12
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          3          1          0          0
 MEAN                       0.001      0.002      0.004      0.001      0.001
 MINIMUM                    0.001                                       0.001
 DATE OF MINIMUM       1991-01-30                                  1991-01-30
 10TH PERCENTILE            0.001                                       0.001
 MEDIAN                     0.001                                       0.001
 90TH PERCENTILE            0.001                                       0.001
 MAXIMUM                    0.001                                       0.001
 DATE OF MAXIMUM       1993-12-01                                  1993-12-01
 STANDARD DEVIATION         0.000                                       0.000




                         FAEC COL         Cd         Hg         Pb       INST
                                        DISS       DISS       DISS     DISCHG
                            36012      48101      80111      82101      97160
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        0          3          3          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12          0          0          0        384
 MEAN                         43.      0.001      0.100      0.001     1127.3
 MINIMUM                       4.                                       182.4
 DATE OF MINIMUM       1993-06-11                                  1993-09-27
 10TH PERCENTILE               4.                                       325.7
 MEDIAN                       34.                                      1009.6
 90TH PERCENTILE              88.                                      2342.0
 MAXIMUM                     130.                                      2735.7
 DATE OF MAXIMUM       1991-01-30                                  1992-11-28
 STANDARD DEVIATION           39.                                       724.6





 STATION - TALKEETNA RIVER                          STATION NO. 028016
 COUNTRY - UNITED STATES                            DEPTH(M)       1.0
 LOCATION - OCT. 1  LAT. 62/21/16  LONG. 150/00/42  ELEVATION(M) 120.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-03-22 TO 1993-10-07

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       52         52         13         11         40
 MEAN                        124.        5.5       0.35       0.03       11.8
 MINIMUM                       0.        0.0       0.10       0.01        0.0
 DATE OF MINIMUM       1991-07-19 1991-03-22 1993-07-08 1991-09-30 1992-07-16
 10TH PERCENTILE               0.        0.0       0.13       0.01       10.7
 MEDIAN                      128.        5.9       0.40       0.03       12.2
 90TH PERCENTILE             205.       10.0       0.40       0.04       14.2
 MAXIMUM                     230.       11.0       0.80       0.04       14.6
 DATE OF MAXIMUM       1992-03-26 1993-07-08 1992-08-18 1992-08-18 1993-03-11
 STANDARD DEVIATION           59.        3.9       0.17       0.01        3.0




                                F        ALK        ALK         pH         Na
                             DISS      TOTAL      TOTAL                  DISS
                            09104      10101      10121      10301      11102
                           mg/L F       mg/L      MEQ/L   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES       10          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3         12          1         52         12
 MEAN                         0.1      38.67      38.00        7.6         7.
 MINIMUM                      0.1      20.00                   6.8         3.
 DATE OF MINIMUM       1991-03-22 1992-06-02            1993-03-11 1992-06-02
 10TH PERCENTILE              0.1      22.40                   7.3         3.
 MEDIAN                       0.1      39.00                   7.6         6.
 90TH PERCENTILE              0.1      49.40                   8.0        13.
 MAXIMUM                      0.2      50.00                   8.1        14.
 DATE OF MAXIMUM       1992-03-26 1993-03-11            1993-10-07 1993-03-11
 STANDARD DEVIATION           0.0       8.86                   0.3         4.




                               Mg         Al         Si          P    P TOTAL
                             DISS       DISS   REACTIVE      TOTAL       DISS
                            12102      13102      14101      15405      15417
                          mg/L Mg    mg/L Al   mg/LSiO2     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        0          1          0          7          8
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         12         13          6          5
 MEAN                          2.      0.063       7.28      0.042      0.012
 MINIMUM                       1.      0.010       5.00      0.010      0.010
 DATE OF MINIMUM       1992-06-02 1991-03-22 1992-07-16 1991-03-22 1991-03-22
 10TH PERCENTILE               1.      0.010       5.15      0.010      0.010
 MEDIAN                        2.      0.030       7.80      0.010      0.010
 90TH PERCENTILE               3.      0.097       8.81      0.082      0.020
 MAXIMUM                       3.      0.250       9.20      0.240      0.020
 DATE OF MAXIMUM       1992-03-26 1993-07-08 1991-03-22 1992-07-16 1993-10-07
 STANDARD DEVIATION            1.      0.065       1.34      0.065      0.004




                         SULPHATE         Cl          K         Ca         Cr
                                        DISS       DISS       DISS       DISS
                            16303      17203      19102      20103      24052
                         mg/L SO4    mg/L Cl     mg/L K    mg/L Ca    mg/L Cr


 NO. OF L-FLAGGED VALUES        0          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13         13         13          1
 MEAN                         15.        11.        1.2     18.015      0.002
 MINIMUM                       6.         2.        0.5      8.200           
 DATE OF MINIMUM       1992-06-02 1992-07-16 1992-06-02 1992-06-02           
 10TH PERCENTILE               6.         3.        0.6      9.940           
 MEDIAN                       16.         6.        1.0     18.000           
 90TH PERCENTILE              20.        25.        1.6     25.000           
 MAXIMUM                      21.        27.        2.9     25.000           
 DATE OF MAXIMUM       1992-03-26 1992-03-26 1993-07-08 1992-03-26           
 STANDARD DEVIATION            5.         9.        0.6      4.916           




                               Mn         Fe         Ni         Cu         Zn
                             DISS      TOTAL       DISS       DISS       DISS
                            25104      26004      28102      29105      30104
                          mg/L Mn    mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES        0          0          9          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         13          4          2          2
 MEAN                        0.01       0.04      0.002      0.001      0.007
 MINIMUM                     0.00       0.01      0.001                      
 DATE OF MINIMUM       1991-07-19 1992-03-26 1991-09-30                      
 10TH PERCENTILE             0.00       0.01      0.001                      
 MEDIAN                      0.01       0.04      0.001                      
 90TH PERCENTILE             0.01       0.07      0.003                      
 MAXIMUM                     0.01       0.10      0.005                      
 DATE OF MAXIMUM       1992-10-01 1993-07-08 1992-08-18                      
 STANDARD DEVIATION          0.00       0.03      0.001                      




                               As         Se   FAEC COL         Cd         Hg
                             DISS       DISS                  DISS       DISS
                            33104      34102      36012      48101      80111
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    ug/L Hg


 NO. OF L-FLAGGED VALUES        1         13          2          1          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          0         10          1          0
 MEAN                       0.001      0.001         9.      0.001      0.100
 MINIMUM                               0.001         0.                      
 DATE OF MINIMUM                  1991-03-22 1993-08-19                      
 10TH PERCENTILE                       0.001         0.                      
 MEDIAN                                0.001         4.                      
 90TH PERCENTILE                       0.001        24.                      
 MAXIMUM                               0.001        40.                      
 DATE OF MAXIMUM                  1993-10-07 1993-03-11                      
 STANDARD DEVIATION                    0.000        13.                      



                               Pb       INST
                             DISS     DISCHG
                            82101      97160
                          mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        2          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0         13
 MEAN                       0.001      159.3
 MINIMUM                                 9.6
 DATE OF MINIMUM                  1991-03-22
 10TH PERCENTILE                        11.2
 MEDIAN                                155.8
 90TH PERCENTILE                       326.6
 MAXIMUM                               441.8
 DATE OF MAXIMUM                  1992-06-02
 STANDARD DEVIATION                    136.3





 STATION - HUDSON RIVER                             STATION NO. 028017
 COUNTRY - UNITED STATES                            DEPTH(M)       3.4
 LOCATION - OCT. 0  LAT. 42/45/08  LONG. 073/41/22  ELEVATION(M)   5.5
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-02-25 TO 1993-10-14

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         12         12         12         12
 MEAN                        253.       12.7       0.48       0.12       10.8
 MINIMUM                     202.        0.5       0.30       0.06        7.5
 DATE OF MINIMUM       1992-05-12 1991-02-25 1991-08-21 1991-11-14 1993-08-26
 10TH PERCENTILE             203.        0.8       0.30       0.06        7.6
 MEDIAN                      244.       12.9       0.45       0.09       10.1
 90TH PERCENTILE             299.       24.4       0.70       0.19       14.1
 MAXIMUM                     369.       27.0       0.70       0.28       14.7
 DATE OF MAXIMUM       1993-03-29 1993-07-14 1992-03-11 1993-03-29 1991-02-25
 STANDARD DEVIATION           49.        9.6       0.15       0.07        2.5




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10101      10301      11102      12102
                           mg/L F       mg/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES       10          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          6         12         12         12
 MEAN                         0.1      49.17        8.0        10.         4.
 MINIMUM                      0.1       0.00        7.7         6.         3.
 DATE OF MINIMUM       1991-02-25 1991-02-25 1992-05-12 1992-05-12 1992-05-12
 10TH PERCENTILE              0.1                   7.7         6.         3.
 MEDIAN                       0.1      51.00        8.0        10.         4.
 90TH PERCENTILE              0.1                   8.1        13.         5.
 MAXIMUM                      0.1      84.00        8.1        15.         6.
 DATE OF MAXIMUM       1993-10-14 1993-03-29 1991-05-08 1993-03-29 1993-08-26
 STANDARD DEVIATION           0.0      28.34        0.1         3.         1.




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES        1          0          0          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         12         12         10         12
 MEAN                       0.033       4.13      0.052      0.023        17.
 MINIMUM                    0.010       2.70      0.010      0.010        11.
 DATE OF MINIMUM       1991-11-14 1991-08-21 1992-05-12 1992-05-12 1992-05-12
 10TH PERCENTILE            0.010       2.78      0.012      0.010        11.
 MEDIAN                     0.025       4.20      0.045      0.020        16.
 90TH PERCENTILE            0.050       5.11      0.074      0.030        20.
 MAXIMUM                    0.110       5.40      0.150      0.040        25.
 DATE OF MAXIMUM       1992-11-18 1991-02-25 1993-03-29 1993-10-14 1993-08-26
 STANDARD DEVIATION         0.027       0.85      0.036      0.009         4.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS       DISS
                            17203      19102      20103      24052      25104
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         12         12          0         12
 MEAN                         17.        1.2     23.583      0.001       0.02
 MINIMUM                      10.        0.8     16.000                  0.01
 DATE OF MINIMUM       1992-05-12 1992-05-12 1992-05-12            1991-08-21
 10TH PERCENTILE              10.        0.8     16.800                  0.01
 MEDIAN                       16.        1.0     23.500                  0.02
 90TH PERCENTILE              23.        1.6     27.700                  0.03
 MAXIMUM                      29.        2.1     29.000                  0.03
 DATE OF MAXIMUM       1993-03-29 1993-03-29 1993-08-26            1992-05-12
 STANDARD DEVIATION            5.        0.4      3.753                  0.01




                               Fe         Ni         Cu         Zn         As
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      33104
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        0          8          0          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12          4          3          3          0
 MEAN                        0.06      0.001      0.004      0.014      0.001
 MINIMUM                     0.02      0.001                                 
 DATE OF MINIMUM       1993-08-26 1991-08-21                                 
 10TH PERCENTILE             0.02      0.001                                 
 MEDIAN                      0.05      0.001                                 
 90TH PERCENTILE             0.06      0.002                                 
 MAXIMUM                     0.20      0.002                                 
 DATE OF MAXIMUM       1992-11-18 1992-08-05                                 
 STANDARD DEVIATION          0.05      0.000                                 




                               Se   FAEC COL         Cd         Hg         Pb
                             DISS                  DISS       DISS       DISS
                            34102      36012      48101      80111      82101
                          mg/L Se   No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       12          1          0          2          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         11          3          1          2
 MEAN                       0.001       494.      0.003      0.100      0.001
 MINIMUM                    0.001        73.                                 
 DATE OF MINIMUM       1991-02-25 1993-10-14                                 
 10TH PERCENTILE            0.001        78.                                 
 MEDIAN                     0.001       202.                                 
 90TH PERCENTILE            0.001       874.                                 
 MAXIMUM                    0.001      2540.                                 
 DATE OF MAXIMUM       1993-10-14 1992-03-11                                 
 STANDARD DEVIATION         0.000       701.                                 



                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES        8
 MEAN                       446.1
 MINIMUM                    133.1
 DATE OF MINIMUM       1993-07-14
 10TH PERCENTILE                 
 MEDIAN                     326.0
 90TH PERCENTILE                 
 MAXIMUM                   1189.4
 DATE OF MAXIMUM       1993-03-29
 STANDARD DEVIATION         352.0





 STATION - ST. MARYS RIVER AT L.SUPERIOR            STATION NO. 028018
 COUNTRY - UNITED STATES                            DEPTH(M)       9.0
 LOCATION - OCT. 0  LAT. 46/29/29  LONG. 084/25/17  ELEVATION(M) 183.3
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-01-09 TO 1992-07-08

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          7          7          3          7
 MEAN                         96.        7.0       0.30       0.01       11.1
 MINIMUM                      93.        0.0       0.30       0.01        8.7
 DATE OF MINIMUM       1992-07-08 1991-01-09 1991-01-09 1991-01-09 1992-04-14
 10TH PERCENTILE                                                             
 MEDIAN                       96.        6.5       0.30       0.01       12.0
 90TH PERCENTILE                                                             
 MAXIMUM                      98.       21.5       0.30       0.02       13.1
 DATE OF MAXIMUM       1991-07-24 1991-07-24 1992-07-08 1991-05-02 1991-01-09
 STANDARD DEVIATION            2.        8.2       0.00       0.00        1.8




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11102      12102      13102
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        6          0          0          0          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          7          7          7          3
 MEAN                         0.1        7.8         2.         3.      0.010
 MINIMUM                      0.1        7.4         1.         3.      0.010
 DATE OF MINIMUM       1991-01-09 1992-04-14 1991-07-24 1991-01-09 1991-01-09
 10TH PERCENTILE                                                             
 MEDIAN                       0.1        7.8         2.         3.      0.010
 90TH PERCENTILE                                                             
 MAXIMUM                      0.1        8.1         2.         3.      0.010
 DATE OF MAXIMUM       1992-07-08 1991-07-24 1991-05-02 1992-07-08 1992-07-08
 STANDARD DEVIATION           0.0        0.2         1.         0.      0.000




                               Si          P    P TOTAL   SULPHATE         Cl
                         REACTIVE      TOTAL       DISS                  DISS
                            14101      15405      15417      16303      17203
                         mg/LSiO2     mg/L P     mg/L P   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          7          7          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          0          0          7          7
 MEAN                        2.29      0.010      0.010         3.         1.
 MINIMUM                     2.10      0.010      0.010         3.         1.
 DATE OF MINIMUM       1991-07-24 1991-01-09 1991-01-09 1991-01-09 1991-01-09
 10TH PERCENTILE                                                             
 MEDIAN                      2.30      0.010      0.010         3.         1.
 90TH PERCENTILE                                                             
 MAXIMUM                     2.50      0.010      0.010         4.         2.
 DATE OF MAXIMUM       1991-01-09 1992-07-08 1992-07-08 1992-01-09 1992-04-14
 STANDARD DEVIATION          0.16      0.000      0.000         0.         1.



                                K         Ca         Cr         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            19102      20103      24052      25104      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          3          1          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          7          0          6          6
 MEAN                         0.5     13.714      0.001       0.00       0.01
 MINIMUM                      0.4     13.000                  0.00       0.00
 DATE OF MINIMUM       1991-05-02 1991-10-16            1991-01-09 1991-07-24
 10TH PERCENTILE                                                             
 MEDIAN                       0.5     14.000                  0.00       0.01
 90TH PERCENTILE                                                             
 MAXIMUM                      0.6     14.000                  0.00       0.02
 DATE OF MAXIMUM       1991-01-09 1991-07-24            1992-07-08 1992-04-14
 STANDARD DEVIATION           0.1      0.488                  0.00       0.01




                               Ni         Cu         Zn         As         Se
                             DISS       DISS       DISS       DISS       DISS
                            28102      29105      30104      33104      34102
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Se


 NO. OF L-FLAGGED VALUES        5          0          0          3          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          3          3          0          0
 MEAN                       0.001      0.003      0.085      0.001      0.001
 MINIMUM                    0.001                                       0.001
 DATE OF MINIMUM       1991-05-02                                  1991-05-02
 10TH PERCENTILE                                                             
 MEDIAN                     0.001                                       0.001
 90TH PERCENTILE                                                             
 MAXIMUM                    0.002                                       0.002
 DATE OF MAXIMUM       1991-01-09                                  1991-01-09
 STANDARD DEVIATION         0.000                                       0.000




                         FAEC COL         Cd         Hg         Pb
                                        DISS       DISS       DISS
                            36012      48101      80111      82101
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        4          3          3          3
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        3          0          0          0
 MEAN                          2.      0.001      0.100      0.001
 MINIMUM                       1.                                 
 DATE OF MINIMUM       1991-10-16                                 
 10TH PERCENTILE                                                  
 MEDIAN                        2.                                 
 90TH PERCENTILE                                                  
 MAXIMUM                       5.                                 
 DATE OF MAXIMUM       1992-07-08                                 
 STANDARD DEVIATION            2.                                 





 STATION - ST. CLAIR RIVER AT L.HURON               STATION NO. 028019
 COUNTRY - UNITED STATES                            DEPTH(M)       9.0
 LOCATION - OCT. 0  LAT. 42/59/19  LONG. 082/25/29  ELEVATION(M) 175.3
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-04-24 TO 1992-09-22

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          8          8          4          8
 MEAN                        213.       12.5       0.50       0.02       11.0
 MINIMUM                     206.        0.5       0.20       0.01        8.8
 DATE OF MINIMUM       1991-09-10 1992-03-25 1991-09-10 1991-04-24 1991-09-10
 10TH PERCENTILE                                                             
 MEDIAN                      213.       15.2       0.35       0.01       10.8
 90TH PERCENTILE                                                             
 MAXIMUM                     225.       20.5       1.50       0.07       14.2
 DATE OF MAXIMUM       1992-03-25 1991-09-10 1992-09-22 1992-09-22 1992-03-25
 STANDARD DEVIATION            7.        7.5       0.42       0.02        1.8




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11102      12102      13102
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        2          0          0          0          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          8          8          8          3
 MEAN                         0.1        8.3         4.         8.      0.013
 MINIMUM                      0.1        8.2         4.         7.      0.010
 DATE OF MINIMUM       1991-04-24 1991-11-07 1991-04-24 1991-06-18 1991-04-24
 10TH PERCENTILE                                                             
 MEDIAN                       0.1        8.4         4.         8.      0.010
 90TH PERCENTILE                                                             
 MAXIMUM                      0.2        8.4         4.         8.      0.020
 DATE OF MAXIMUM       1992-03-25 1991-09-10 1992-09-22 1991-05-29 1992-07-07
 STANDARD DEVIATION           0.1        0.1         0.         1.      0.005




                               Si          P    P TOTAL   SULPHATE         Cl
                         REACTIVE      TOTAL       DISS                  DISS
                            14101      15405      15417      16303      17203
                         mg/LSiO2     mg/L P     mg/L P   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          5          7          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          3          1          8          8
 MEAN                        0.93      0.027      0.014        16.         7.
 MINIMUM                     0.60      0.010      0.010        13.         6.
 DATE OF MINIMUM       1991-05-29 1991-06-18 1991-04-24 1991-06-18 1992-07-07
 10TH PERCENTILE                                                             
 MEDIAN                      0.95      0.010      0.010        16.         7.
 90TH PERCENTILE                                                             
 MAXIMUM                     1.30      0.120      0.040        18.         8.
 DATE OF MAXIMUM       1992-03-25 1992-09-22 1992-09-22 1992-03-25 1992-03-25
 STANDARD DEVIATION          0.27      0.038      0.011         2.         1.




                                K         Ca         Cr         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            19102      20103      24052      25104      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          2          6          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          8          1          1          5
 MEAN                         0.9     29.125      0.001       0.00       0.00
 MINIMUM                      0.8     28.000                  0.00       0.00
 DATE OF MINIMUM       1992-07-07 1991-11-07            1991-04-24 1991-09-10
 10TH PERCENTILE                                                             
 MEDIAN                       0.9     29.000                  0.00       0.00
 90TH PERCENTILE                                                             
 MAXIMUM                      1.0     30.000                  0.00       0.01
 DATE OF MAXIMUM       1991-05-29 1992-03-25            1992-09-22 1991-05-29
 STANDARD DEVIATION           0.1      0.835                  0.00       0.01




                               Ni         Cu         Zn         As         Se
                             DISS       DISS       DISS       DISS       DISS
                            28102      29105      30104      33104      34102
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Se


 NO. OF L-FLAGGED VALUES        4          0          1          3          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          3          2          0          0
 MEAN                       0.001      0.001      0.009      0.001      0.001
 MINIMUM                    0.001                                       0.001
 DATE OF MINIMUM       1991-04-24                                  1991-04-24
 10TH PERCENTILE                                                             
 MEDIAN                     0.001                                       0.001
 90TH PERCENTILE                                                             
 MAXIMUM                    0.001                                       0.001
 DATE OF MAXIMUM       1992-09-22                                  1992-09-22
 STANDARD DEVIATION         0.000                                       0.000




                         FAEC COL         Cd         Hg         Pb
                                        DISS       DISS       DISS
                            36012      48101      80111      82101
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        2          3          3          2
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        5          0          0          1
 MEAN                          4.      0.001      0.100      0.001
 MINIMUM                       1.                                 
 DATE OF MINIMUM       1991-04-24                                 
 10TH PERCENTILE                                                  
 MEDIAN                        1.                                 
 90TH PERCENTILE                                                  
 MAXIMUM                      14.                                 
 DATE OF MAXIMUM       1991-05-29                                 
 STANDARD DEVIATION            5.                                 





 STATION - NIAGARA RIVER AT LAKE ONTARIO            STATION NO. 028020
 COUNTRY - UNITED STATES                            DEPTH(M)      22.0
 LOCATION - OCT. 0  LAT. 43/16/10  LONG. 079/03/52  ELEVATION(M)  75.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-04-16 TO 1993-11-03

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       99         99         12         12         91
 MEAN                        281.       13.1       0.29       0.04       11.1
 MINIMUM                     260.        5.2       0.20       0.01        8.4
 DATE OF MINIMUM       1991-04-24 1993-04-26 1991-08-19 1991-08-19 1993-08-31
 10TH PERCENTILE             264.        5.3       0.20       0.01        8.8
 MEDIAN                      277.       11.0       0.30       0.04       10.8
 90TH PERCENTILE             308.       23.1       0.37       0.05       13.9
 MAXIMUM                     320.       24.4       0.40       0.06       17.8
 DATE OF MAXIMUM       1992-04-22 1993-08-31 1993-06-07 1992-04-28 1992-04-22
 STANDARD DEVIATION           14.        6.8       0.07       0.01        1.9




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS      TOTAL
                            09104      10301      11102      12102      13002
                           mg/L F   pH UNITS    mg/L Na    mg/L Mg    mg/L Al


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         91         12         12          5
 MEAN                         0.2        8.1         9.         8.      0.122
 MINIMUM                      0.1        7.4         8.         8.      0.020
 DATE OF MINIMUM       1991-04-16 1992-04-22 1991-06-18 1991-06-18 1991-08-28
 10TH PERCENTILE              0.1        8.0         8.         8.           
 MEDIAN                       0.2        8.1         9.         8.      0.050
 90TH PERCENTILE              0.2        8.2        10.         9.           
 MAXIMUM                      0.2        8.3        11.         9.      0.420
 DATE OF MAXIMUM       1992-04-28 1991-11-12 1993-06-07 1992-06-17 1991-04-24
 STANDARD DEVIATION           0.1        0.1         1.         1.      0.168




                               Al         Si          P    P TOTAL   SULPHATE
                             DISS   REACTIVE      TOTAL       DISS           
                            13102      14101      15405      15417      16303
                          mg/L Al   mg/LSiO2     mg/L P     mg/L P   mg/L SO4


 NO. OF L-FLAGGED VALUES       11          0          6         10          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1         12         10          2         16
 MEAN                       0.010       0.38      0.014      0.011        26.
 MINIMUM                    0.010       0.10      0.000      0.010        24.
 DATE OF MINIMUM       1991-04-16 1991-06-18 1991-05-21 1991-04-16 1991-04-24
 10TH PERCENTILE            0.010       0.10      0.006      0.010        24.
 MEDIAN                     0.010       0.35      0.010      0.010        26.
 90TH PERCENTILE            0.010       0.50      0.024      0.010        28.
 MAXIMUM                    0.010       0.70      0.050      0.020        33.
 DATE OF MAXIMUM       1993-11-03 1993-11-03 1991-04-16 1993-06-07 1991-11-12
 STANDARD DEVIATION         0.000       0.18      0.011      0.003         2.




                               Cl          K         Ca         Cr         Mn
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      24052      25004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          3          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         12         12          0          2
 MEAN                         17.        1.4     34.167      0.001       0.01
 MINIMUM                      14.        1.3     32.000                  0.01
 DATE OF MINIMUM       1993-08-31 1992-04-28 1992-11-04            1991-04-24
 10TH PERCENTILE              15.        1.3     32.000                      
 MEDIAN                       16.        1.4     34.000                  0.01
 90TH PERCENTILE              19.        1.4     35.700                      
 MAXIMUM                      21.        1.6     36.000                  0.01
 DATE OF MAXIMUM       1991-11-12 1992-11-04 1992-06-17            1991-10-28
 STANDARD DEVIATION            2.        0.1      1.337                  0.00




                               Mn         Fe         Fe         Ni         Ni
                             DISS      TOTAL       DISS      TOTAL       DISS
                            25104      26004      26104      28001      28102
                          mg/L Mn    mg/L Fe    mg/L Fe    mg/L Ni    mg/L Ni


 NO. OF L-FLAGGED VALUES        1          3          0          1          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11          9          5          4          8
 MEAN                        0.00       0.01       0.18      0.003      0.002
 MINIMUM                     0.00       0.00       0.05      0.001      0.001
 DATE OF MINIMUM       1991-04-16 1991-08-19 1991-05-21 1991-06-24 1991-08-19
 10TH PERCENTILE             0.00       0.00                            0.001
 MEDIAN                      0.00       0.01       0.09      0.002      0.001
 90TH PERCENTILE             0.00       0.01                            0.003
 MAXIMUM                     0.00       0.01       0.56      0.005      0.009
 DATE OF MAXIMUM       1993-11-03 1991-06-18 1991-04-24 1991-08-28 1991-06-18
 STANDARD DEVIATION          0.00       0.01       0.21      0.002      0.002




                               Cu         Cu         Zn         Zn         As
                            TOTAL       DISS      TOTAL       DISS       DISS
                            29006      29105      30004      30104      33104
                          mg/L Cu    mg/L Cu    mg/L Zn    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES        0          0          5          1          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          3          0          2          0
 MEAN                       0.004      0.003      0.010      0.008      0.001
 MINIMUM                    0.003                 0.010                      
 DATE OF MINIMUM       1991-04-24            1991-04-24                      
 10TH PERCENTILE                                                             
 MEDIAN                     0.003                 0.010                      
 90TH PERCENTILE                                                             
 MAXIMUM                    0.009                 0.010                      
 DATE OF MAXIMUM       1991-10-28            1991-10-28                      
 STANDARD DEVIATION         0.003                 0.000                      




                               Se   FAEC COL         Cd         Cd         Ba
                             DISS                 TOTAL       DISS      TOTAL
                            34102      36012      48001      48101      80016
                          mg/L Se   No/100ml    mg/L Cd    mg/L Cd    ug/L Hg


 NO. OF L-FLAGGED VALUES       12          0          5          3          5
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         12          0          0          0
 MEAN                       0.001       222.      0.001      0.001      0.100
 MINIMUM                    0.001         4.      0.001                 0.100
 DATE OF MINIMUM       1991-04-16 1992-06-17 1991-04-24            1991-04-24
 10TH PERCENTILE            0.001         6.                                 
 MEDIAN                     0.001        30.      0.001                 0.100
 90TH PERCENTILE            0.001       251.                                 
 MAXIMUM                    0.001      1860.      0.001                 0.100
 DATE OF MAXIMUM       1993-11-03 1992-11-04 1991-10-28            1991-10-28
 STANDARD DEVIATION         0.000       522.      0.000                 0.000




                               Hg         Pb         Pb       INST
                             DISS      TOTAL       DISS     DISCHG
                            80111      82001      82101      97160
                          ug/L Hg    mg/L Pb    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        3          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        0          5          2          7
 MEAN                       0.100      0.005      0.004     6489.4
 MINIMUM                               0.002                6003.9
 DATE OF MINIMUM                  1991-04-24            1991-08-28
 10TH PERCENTILE                                                  
 MEDIAN                                0.002                6485.3
 90TH PERCENTILE                                                  
 MAXIMUM                               0.016                6853.5
 DATE OF MAXIMUM                  1991-08-28            1993-04-26
 STANDARD DEVIATION                    0.006                 304.4





 STATION - SAINT LAWRENCE RIVER                     STATION NO. 028021
 COUNTRY - UNITED STATES                            DEPTH(M)    9999.9
 LOCATION - OCT. 0  LAT. 45/00/22  LONG. 074/47/43  ELEVATION(M)  46.0
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1991-01-01 TO 1993-12-31
 PERIOD OF RECORD FROM  - 1991-03-06 TO 1993-10-19

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07551      08102
                            us/cm      deg C     mg/L N     mg/L N    mg/L O2


 NO. OF L-FLAGGED VALUES        0          0          0          5          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       26         26         12          7         26
 MEAN                        306.       11.5       0.22       0.02       11.4
 MINIMUM                     275.        0.0       0.10       0.01        9.2
 DATE OF MINIMUM       1991-03-19 1991-03-06 1991-07-29 1991-03-06 1991-07-29
 10TH PERCENTILE             290.        0.8       0.10       0.01        9.5
 MEDIAN                      302.       11.5       0.25       0.01       11.2
 90TH PERCENTILE             326.       21.3       0.30       0.04       13.3
 MAXIMUM                     343.       23.5       0.30       0.05       14.7
 DATE OF MAXIMUM       1992-07-20 1991-07-29 1991-05-13 1993-10-19 1991-03-06
 STANDARD DEVIATION           16.        7.9       0.09       0.02        1.6




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10101      10301      11102      12102
                           mg/L F       mg/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        5          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          5         26         12         12
 MEAN                         0.1      92.40        8.0        12.         8.
 MINIMUM                      0.1      88.00        7.6        11.         8.
 DATE OF MINIMUM       1991-03-06 1992-10-05 1992-03-31 1991-05-13 1991-03-06
 10TH PERCENTILE              0.1                   7.6        11.         8.
 MEDIAN                       0.1      93.00        8.1        12.         8.
 90TH PERCENTILE              0.2                   8.3        12.         8.
 MAXIMUM                      0.2      96.00        8.6        13.         8.
 DATE OF MAXIMUM       1992-10-05 1993-06-23 1992-05-04 1993-10-19 1993-10-19
 STANDARD DEVIATION           0.0       3.36        0.3         1.         0.




                               Al         Al         Si          P    P TOTAL
                            TOTAL       DISS   REACTIVE      TOTAL       DISS
                            13002      13102      14101      15405      15417
                          mg/L Al    mg/L Al   mg/LSiO2     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        1         15          1          9          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          2         11          9          5
 MEAN                       0.044      0.020       0.33      0.017      0.012
 MINIMUM                    0.010      0.010       0.01      0.010      0.010
 DATE OF MINIMUM       1991-04-02 1991-05-13 1991-05-13 1991-03-06 1991-05-13
 10TH PERCENTILE                       0.010       0.05      0.010      0.010
 MEDIAN                     0.040      0.010       0.35      0.010      0.010
 90TH PERCENTILE                       0.040       0.47      0.030      0.017
 MAXIMUM                    0.080      0.040       0.70      0.050      0.020
 DATE OF MAXIMUM       1991-11-19 1991-05-13 1993-04-08 1991-10-16 1991-10-16
 STANDARD DEVIATION         0.027      0.014       0.18      0.011      0.004




                         SULPHATE         Cl    LINDANE          K         Ca
                                        DISS                  DISS       DISS
                            16303      17203      18070      19102      20103
                         mg/L SO4    mg/L Cl       ug/L     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14         18          1         12         12
 MEAN                         26.        21.      0.200        1.5     36.500
 MINIMUM                      22.        18.                   1.4     35.000
 DATE OF MINIMUM       1991-05-13 1991-03-19            1991-05-13 1992-10-05
 10TH PERCENTILE              22.        19.                   1.4     35.000
 MEDIAN                       26.        21.                   1.5     36.000
 90TH PERCENTILE              29.        24.                   1.5     38.000
 MAXIMUM                      31.        25.                   1.8     39.000
 DATE OF MAXIMUM       1991-10-16 1991-10-16            1993-10-19 1991-03-06
 STANDARD DEVIATION            3.         2.                   0.1      1.382




                               Cr         Mn         Mn         Fe         Fe
                             DISS      TOTAL       DISS      TOTAL       DISS
                            24052      25004      25104      26004      26104
                          mg/L Cr    mg/L Mn    mg/L Mn    mg/L Fe    mg/L Fe


 NO. OF L-FLAGGED VALUES        3          3          4          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          5          8         11          8
 MEAN                       0.001       0.06       0.00       0.01       0.74
 MINIMUM                                0.01       0.00       0.00       0.06
 DATE OF MINIMUM                  1991-05-13 1991-03-06 1991-10-16 1991-11-19
 10TH PERCENTILE                                   0.00       0.00           
 MEDIAN                                 0.01       0.00       0.01       0.47
 90TH PERCENTILE                                   0.00       0.02           
 MAXIMUM                                0.23       0.01       0.02       2.40
 DATE OF MAXIMUM                  1991-06-18 1993-04-08 1993-08-17 1991-04-16
 STANDARD DEVIATION                     0.08       0.00       0.01       0.85




                               Ni         Ni         Cu         Cu         Zn
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            28001      28102      29006      29105      30004
                          mg/L Ni    mg/L Ni    mg/L Cu    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES        0          4          0          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         14          6          9          5
 MEAN                       0.003      0.002      0.015      0.004      0.140
 MINIMUM                    0.001      0.001      0.004      0.002      0.010
 DATE OF MINIMUM       1991-11-19 1991-03-06 1991-09-30 1991-03-06 1991-05-13
 10TH PERCENTILE                       0.001                                 
 MEDIAN                     0.003      0.001      0.016      0.002      0.090
 90TH PERCENTILE                       0.003                                 
 MAXIMUM                    0.006      0.004      0.027      0.009      0.380
 DATE OF MAXIMUM       1991-05-13 1991-04-16 1991-04-02 1991-04-02 1991-04-16
 STANDARD DEVIATION         0.002      0.001      0.009      0.003      0.146




                               Zn         As         Se   FAEC COL         Cd
                             DISS       DISS       DISS                 TOTAL
                            30104      33104      34102      36012      48001
                          mg/L Zn    mg/L As    mg/L Se   No/100ml    mg/L Cd


 NO. OF L-FLAGGED VALUES        0          3         12          0          8
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        9          0          0         12          0
 MEAN                       0.058      0.001      0.001        10.      0.001
 MINIMUM                    0.006                 0.001         0.      0.001
 DATE OF MINIMUM       1991-08-08            1991-03-06 1991-03-06 1991-03-19
 10TH PERCENTILE                                  0.001         0.           
 MEDIAN                     0.051                 0.001         4.      0.001
 90TH PERCENTILE                                  0.001        26.           
 MAXIMUM                    0.147                 0.001        44.      0.001
 DATE OF MAXIMUM       1991-04-16            1993-10-19 1992-07-20 1991-11-19
 STANDARD DEVIATION         0.049                 0.000        14.      0.000




                               Cd         Ba         Hg         Pb         Pb
                             DISS      TOTAL       DISS      TOTAL       DISS
                            48101      80016      80111      82001      82101
                          mg/L Cd    ug/L Hg    ug/L Hg    mg/L Pb    mg/L Pb


 NO. OF L-FLAGGED VALUES        3          6          3          0          5
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          2          0          7          4
 MEAN                       0.000      0.175      0.100      0.004      0.001
 MINIMUM                    0.000      0.100                 0.002      0.001
 DATE OF MINIMUM       1991-03-19 1991-03-19            1991-04-02 1991-03-19
 10TH PERCENTILE                                                             
 MEDIAN                     0.000      0.100                 0.004      0.001
 90TH PERCENTILE                                                             
 MAXIMUM                    0.001      0.600                 0.006      0.002
 DATE OF MAXIMUM       1991-05-13 1991-09-30            1991-03-19 1991-03-06
 STANDARD DEVIATION         0.001      0.175                 0.001      0.000




                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       21
 MEAN                      3533.2
 MINIMUM                      0.0
 DATE OF MINIMUM       1991-03-06
 10TH PERCENTILE              0.0
 MEDIAN                       0.0
 90TH PERCENTILE           8821.7
 MAXIMUM                   9204.0
 DATE OF MAXIMUM       1991-05-13
 STANDARD DEVIATION        4138.4





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Last updated: 2001-07-30