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STATISTICS FOR THE UNITED STATES OF AMERICA

STATISTICS FOR THE UNITED STATES OF AMERICA


GEMS/WATER - STATISTICAL SUMMARY BY STATION     2002-01-30   PAGE 801

 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-04 TO 1994-08-26

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2        NH3         O2
                             COND                                        DISS
                            02041      02061      07105      07555      08101
                            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        3          3          3          3          3
 MEAN                        357.       17.3       1.07       0.06        9.3
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                                F         pH         Na         Mg         Al
                             DISS                  DISS       DISS       DISS
                            09104      10301      11105      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          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          3          3          3          3
 MEAN                         0.1        7.8        15.        11.      0.057
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               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          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          3          3          3          3
 MEAN                        5.03      0.173      0.060        45.        16.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                                K         Ca         Mn         Fe         Ni
                             DISS       DISS       DISS      TOTAL       DISS
                            19102      20103      25104      26004      28102
                           mg/L K    mg/L Ca    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          3          3          3          3
 MEAN                         2.9     36.333       0.01       0.04      0.002
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               Se   FAEC COL       INST
                             DISS                DISCHG
                            34102      36012      97160
                          mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        3          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        0          3          3
 MEAN                       0.001       124.    24987.7
 MINIMUM                                               
 DATE OF MINIMUM                                       
 10TH PERCENTILE                                       
 MEDIAN                                                
 90TH PERCENTILE                                       
 MAXIMUM                                               
 DATE OF MAXIMUM                                       
 STANDARD DEVIATION                                    





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-16 TO 1994-12-20

 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          3          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         11          2          8          9
 MEAN                        155.       13.3        1.7       0.15       0.02
 MINIMUM                     126.        3.9                  0.05       0.01
 DATE OF MINIMUM       1994-06-15 1994-02-16            1994-06-15 1994-02-16
 10TH PERCENTILE             127.        4.1                  0.05       0.01
 MEDIAN                      153.       14.1                  0.20       0.02
 90TH PERCENTILE             177.       21.2                  0.20       0.03
 MAXIMUM                     180.       21.6                  0.40       0.06
 DATE OF MAXIMUM       1994-04-13 1994-07-27            1994-08-10 1994-06-15
 STANDARD DEVIATION           18.        6.2                  0.11       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          1          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         10         11         11         11
 MEAN                        10.0        0.1        8.1         6.         5.
 MINIMUM                      0.0        0.1        7.7         4.         2.
 DATE OF MINIMUM       1994-12-20 1994-03-16 1994-07-27 1994-06-15 1994-04-13
 10TH PERCENTILE              0.9        0.1        7.7         4.         2.
 MEDIAN                      10.4        0.1        7.9         6.         5.
 90TH PERCENTILE             13.0        0.2        8.5         7.         6.
 MAXIMUM                     13.6        0.2        8.5         8.         6.
 DATE OF MAXIMUM       1994-03-16 1994-07-27 1994-05-11 1994-11-08 1994-03-16
 STANDARD DEVIATION           3.6        0.1        0.3         1.         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        0          0          1          5          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4         11         10          6         11
 MEAN                       0.010       8.58      0.025      0.019        11.
 MINIMUM                    0.005       5.00      0.010      0.010         4.
 DATE OF MINIMUM       1994-06-15 1994-10-24 1994-03-16 1994-04-13 1994-04-13
 10TH PERCENTILE                        5.13      0.010      0.010         4.
 MEDIAN                     0.008       8.50      0.020      0.010        11.
 90TH PERCENTILE                        9.67      0.040      0.030        14.
 MAXIMUM                    0.017      14.00      0.040      0.050        14.
 DATE OF MAXIMUM       1994-05-11 1994-04-13 1994-08-10 1994-08-10 1994-03-16
 STANDARD DEVIATION         0.005       2.25      0.012      0.013         3.



                               Cl    LINDANE          K         Ca         Cr
                             DISS                  DISS       DISS       DISS
                            17203      18070      19102      20103      24052
                          mg/L Cl       ug/L     mg/L K    mg/L Ca    mg/L Cr


 NO. OF L-FLAGGED VALUES        0          3          0          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11          0         11         11          2
 MEAN                          3.      0.100        1.1     16.573      0.001
 MINIMUM                       2.                   0.7      6.300      0.001
 DATE OF MINIMUM       1994-06-15            1994-04-13 1994-04-13 1994-05-11
 10TH PERCENTILE               2.                   0.7      7.270           
 MEDIAN                        3.                   1.1     17.000      0.001
 90TH PERCENTILE               4.                   1.3     20.700           
 MAXIMUM                       5.                   1.4     21.000      0.001
 DATE OF MAXIMUM       1994-04-13            1994-11-08 1994-03-16 1994-11-08
 STANDARD DEVIATION            1.                   0.2      3.879      0.000




                               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        9          1          4          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2         10          0          4          2
 MEAN                        0.00       0.02      0.001      0.002      0.003
 MINIMUM                     0.00       0.00      0.001      0.001      0.001
 DATE OF MINIMUM       1994-02-16 1994-10-24 1994-05-11 1994-05-11 1994-05-11
 10TH PERCENTILE             0.00       0.00                                 
 MEDIAN                      0.00       0.01      0.001      0.001      0.001
 90TH PERCENTILE             0.00       0.03                                 
 MAXIMUM                     0.01       0.13      0.001      0.003      0.008
 DATE OF MAXIMUM       1994-04-13 1994-04-13 1994-11-08 1994-11-08 1994-11-08
 STANDARD DEVIATION          0.00       0.04      0.000      0.001      0.004




                               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          4          2          4          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          0          9          0          0
 MEAN                       0.001      0.001         2.      0.001      0.100
 MINIMUM                    0.001      0.001         1.      0.001           
 DATE OF MINIMUM       1994-05-11 1994-05-11 1994-02-16 1994-05-11           
 10TH PERCENTILE                                     1.                      
 MEDIAN                     0.001      0.001         2.      0.001           
 90TH PERCENTILE                                     3.                      
 MAXIMUM                    0.001      0.001         5.      0.001           
 DATE OF MAXIMUM       1994-11-08 1994-11-08 1994-09-15 1994-11-08           
 STANDARD DEVIATION         0.000      0.000         1.      0.000           




                               Pb
                             DISS
                            82101
                          mg/L Pb


 NO. OF L-FLAGGED VALUES        4
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES        0
 MEAN                       0.001
 MINIMUM                    0.001
 DATE OF MINIMUM       1994-05-11
 10TH PERCENTILE                 
 MEDIAN                     0.001
 90TH PERCENTILE                 
 MAXIMUM                    0.001
 DATE OF MAXIMUM       1994-11-08
 STANDARD DEVIATION         0.000





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-04-11 TO 1995-09-14

 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          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       20         19          5          4         18
 MEAN                        200.       10.5       0.12       0.03       10.1
 MINIMUM                     150.        0.0       0.09       0.01        6.1
 DATE OF MINIMUM       1995-06-09 1995-02-14 1995-06-09 1994-09-07 1995-04-18
 10TH PERCENTILE             150.        0.0                              8.3
 MEDIAN                      180.       11.0       0.10       0.04       10.1
 90TH PERCENTILE             238.       14.0                             12.2
 MAXIMUM                     304.       14.0       0.20       0.06       12.5
 DATE OF MAXIMUM       1995-04-18 1995-06-09 1995-04-18 1995-04-18 1994-09-07
 STANDARD DEVIATION           48.        4.1       0.05       0.02        1.7




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10121      10301      11102      12102
                           mg/L F      MEQ/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          4         19          7          5
 MEAN                         0.1      88.00        7.8         3.         7.
 MINIMUM                      0.1      67.00        7.1         2.         5.
 DATE OF MINIMUM       1994-07-26 1994-09-07 1995-04-18 1994-06-09 1995-06-09
 10TH PERCENTILE                                    7.5                      
 MEDIAN                       0.1      75.50        7.8         2.         6.
 90TH PERCENTILE                                    7.9                      
 MAXIMUM                      0.1     134.00        8.2         4.        10.
 DATE OF MAXIMUM       1995-09-14 1995-04-18 1994-09-07 1994-04-11 1995-04-18
 STANDARD DEVIATION           0.0      31.38        0.2         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        1          0          0          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          5          5          2          5
 MEAN                       0.064       7.82      0.102      0.018        23.
 MINIMUM                    0.010       6.10      0.010      0.010        15.
 DATE OF MINIMUM       1995-04-18 1995-06-09 1995-04-18 1994-09-07 1995-06-09
 10TH PERCENTILE                                                             
 MEDIAN                     0.070       6.60      0.100      0.010        22.
 90TH PERCENTILE                                                             
 MAXIMUM                    0.100      13.00      0.200      0.040        34.
 DATE OF MAXIMUM       1995-09-14 1995-04-18 1994-09-07 1995-06-09 1995-09-14
 STANDARD DEVIATION         0.034       2.91      0.088      0.013         7.





                               Cl          K         Ca         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      25104      26004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          5          5          5          5
 MEAN                          1.        2.8     30.600       0.03       0.32
 MINIMUM                       1.        1.0     22.000       0.01       0.23
 DATE OF MINIMUM       1994-07-26 1994-07-26 1995-06-09 1994-07-26 1994-09-07
 10TH PERCENTILE                                                             
 MEDIAN                        1.        1.0     27.000       0.01       0.26
 90TH PERCENTILE                                                             
 MAXIMUM                       1.        9.5     47.000       0.12       0.52
 DATE OF MAXIMUM       1995-09-14 1995-04-18 1995-04-18 1995-04-18 1995-06-09
 STANDARD DEVIATION            0.        3.8      9.864       0.05       0.12




                               Ni         Se   FAEC COL       INST
                             DISS       DISS                DISCHG
                            28102      34102      36012      97160
                          mg/L Ni    mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        0          5          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        5          0          5          6
 MEAN                       0.002      0.001         3.     9230.3
 MINIMUM                    0.001      0.001         1.     1203.6
 DATE OF MINIMUM       1994-07-26 1994-07-26 1995-04-18 1995-04-18
 10TH PERCENTILE                                                  
 MEDIAN                     0.002      0.001         2.    11979.0
 90TH PERCENTILE                                                  
 MAXIMUM                    0.002      0.002         6.    15292.8
 DATE OF MAXIMUM       1995-09-14 1995-09-14 1994-09-07 1994-09-07
 STANDARD DEVIATION         0.001      0.000         2.     6246.9





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-28 TO 1996-12-02

 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       23         23         11         16         23
 MEAN                        608.       14.9        0.1        4.1       1.19
 MINIMUM                     301.        1.7        0.1        3.2       0.40
 DATE OF MINIMUM       1996-05-09 1995-12-14 1996-02-22 1995-12-14 1996-10-25
 10TH PERCENTILE             359.        2.8        0.1        3.3       0.63
 MEDIAN                      670.       13.8        0.1        4.0       1.10
 90TH PERCENTILE             757.       26.7        0.1        4.7       1.70
 MAXIMUM                     858.       28.2        0.1        6.0       1.90
 DATE OF MAXIMUM       1995-12-14 1995-07-28 1996-12-02 1996-05-09 1996-04-11
 STANDARD DEVIATION          161.        9.4        0.0        0.7       0.41




                              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        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       20         23         21          8         23
 MEAN                        0.06        9.3        0.4     154.12        7.9
 MINIMUM                     0.01        6.1        0.2     114.00        7.2
 DATE OF MINIMUM       1994-11-04 1996-06-26 1994-02-28 1995-05-26 1994-02-28
 10TH PERCENTILE             0.02        6.4        0.2                   7.5
 MEDIAN                      0.03        9.5        0.4     156.50        7.8
 90TH PERCENTILE             0.16       12.1        0.4                   8.2
 MAXIMUM                     0.34       13.6        0.5     213.00        8.5
 DATE OF MAXIMUM       1996-04-11 1995-12-14 1996-07-15 1995-11-08 1994-07-14
 STANDARD DEVIATION          0.08        2.5        0.1      31.79        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          4          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       21         21         17         21         23
 MEAN                         46.        18.      0.013      10.26      0.269
 MINIMUM                      12.        11.      0.001       6.90      0.090
 DATE OF MINIMUM       1995-05-26 1995-05-26 1996-03-29 1996-05-09 1996-04-11
 10TH PERCENTILE              24.        11.      0.002       8.22      0.100
 MEDIAN                       50.        19.      0.010      10.00      0.170
 90TH PERCENTILE              64.        22.      0.019      12.00      0.440
 MAXIMUM                      65.        23.      0.100      14.00      0.880
 DATE OF MAXIMUM       1995-12-14 1995-12-14 1995-05-26 1996-02-22 1996-06-26
 STANDARD DEVIATION           16.         4.      0.022       1.67      0.202




                          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       23         21         21         21         21
 MEAN                       0.077       131.        18.        6.0     56.905
 MINIMUM                    0.040        50.         9.        3.8     36.000
 DATE OF MINIMUM       1996-10-25 1995-05-26 1995-05-26 1994-02-28 1996-05-09
 10TH PERCENTILE            0.050        64.        10.        4.4     43.400
 MEDIAN                     0.080       140.        19.        5.9     59.000
 90TH PERCENTILE            0.106       170.        25.        6.9     65.700
 MAXIMUM                    0.130       200.        25.        7.9     67.000
 DATE OF MAXIMUM       1994-07-14 1995-11-30 1996-02-14 1996-10-25 1995-12-14
 STANDARD DEVIATION         0.022        42.         5.        1.0      7.949




                               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        5          5         11          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         16         10         21         14
 MEAN                       0.002       0.00       0.01      0.003      0.002
 MINIMUM                    0.001       0.00       0.00      0.001      0.001
 DATE OF MINIMUM       1996-03-29 1994-02-28 1994-07-14 1995-11-08 1995-11-08
 10TH PERCENTILE            0.001       0.00       0.00      0.002      0.001
 MEDIAN                     0.002       0.00       0.00      0.003      0.002
 90TH PERCENTILE            0.005       0.00       0.02      0.003      0.003
 MAXIMUM                    0.005       0.01       0.08      0.003      0.003
 DATE OF MAXIMUM       1995-12-14 1996-02-14 1995-05-26 1996-08-08 1996-04-19
 STANDARD DEVIATION         0.001       0.00       0.02      0.001      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        9          1          6          1         15
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6         14         15         21          0
 MEAN                       0.002      0.002      0.002       939.      0.001
 MINIMUM                    0.001      0.001      0.001       100.      0.001
 DATE OF MINIMUM       1996-03-29 1996-05-09 1994-02-28 1994-09-15 1995-11-08
 10TH PERCENTILE            0.001      0.001      0.001       203.      0.001
 MEDIAN                     0.001      0.002      0.002       520.      0.001
 90TH PERCENTILE            0.004      0.003      0.002      1310.      0.001
 MAXIMUM                    0.004      0.003      0.005      7400.      0.001
 DATE OF MAXIMUM       1996-02-22 1996-08-08 1994-07-14 1996-05-09 1996-12-02
 STANDARD DEVIATION         0.001      0.001      0.001      1502.      0.000




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


 NO. OF L-FLAGGED VALUES       15          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0         23
 MEAN                       0.001     3568.0
 MINIMUM                    0.001     1472.6
 DATE OF MINIMUM       1995-11-08 1996-02-22
 10TH PERCENTILE            0.001     1521.9
 MEDIAN                     0.001     2769.7
 90TH PERCENTILE            0.001     6830.8
 MAXIMUM                    0.001    10733.0
 DATE OF MAXIMUM       1996-12-02 1995-05-26
 STANDARD DEVIATION         0.000     2325.1





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-01-27 TO 1995-08-30

 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          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       42         37         15         12         42
 MEAN                        169.       14.6       0.92       0.03       10.0
 MINIMUM                      92.        7.0       0.40       0.01        7.0
 DATE OF MINIMUM       1994-04-14 1994-04-08 1995-08-30 1994-06-30 1994-06-17
 10TH PERCENTILE             108.        7.6       0.50       0.01        7.1
 MEDIAN                      142.        9.5       0.90       0.03       10.6
 90TH PERCENTILE             243.       24.2       1.30       0.05       12.0
 MAXIMUM                     344.       26.0       1.60       0.06       13.0
 DATE OF MAXIMUM       1995-08-30 1994-06-30 1995-06-14 1995-06-13 1995-01-27
 STANDARD DEVIATION           65.        7.2       0.31       0.01        2.0




                                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       15          1          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         10          5         42         15
 MEAN                         0.1      30.45      29.80        7.5         8.
 MINIMUM                      0.1      19.00      24.00        6.6         4.
 DATE OF MINIMUM       1994-04-08 1994-04-08 1994-08-19 1994-04-14 1994-04-08
 10TH PERCENTILE              0.1      19.50                   6.7         4.
 MEDIAN                       0.1      31.00      25.00        7.5         8.
 90TH PERCENTILE              0.1      39.60                   8.0        10.
 MAXIMUM                      0.1      44.00      40.00        8.5        21.
 DATE OF MAXIMUM       1995-08-30 1994-11-17 1994-09-07 1995-06-13 1995-08-30
 STANDARD DEVIATION           0.0       7.63       7.63        0.5         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          1          8
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       15          6         15         14          7
 MEAN                          6.      0.037       3.65      0.053      0.017
 MINIMUM                       3.      0.010       1.70      0.010      0.010
 DATE OF MINIMUM       1994-04-08 1995-06-14 1994-06-08 1994-11-17 1994-04-08
 10TH PERCENTILE               3.                  2.05      0.015      0.010
 MEDIAN                        6.      0.030       3.90      0.050      0.010
 90TH PERCENTILE               8.                  4.40      0.080      0.030
 MAXIMUM                      14.      0.090       5.00      0.110      0.050
 DATE OF MAXIMUM       1995-08-30 1994-06-30 1995-01-27 1994-08-19 1995-06-13
 STANDARD DEVIATION            3.      0.028       0.94      0.028      0.012




                         SULPHATE         Cl          K         Ca         Mn
                                        DISS       DISS       DISS       DISS
                            16303      17203      19102      20103      25104
                         mg/L SO4    mg/L Cl     mg/L K    mg/L Ca    mg/L Mn


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       15         15         15         15         10
 MEAN                         34.        13.        1.7     21.733       0.03
 MINIMUM                      18.         6.        1.0     13.000       0.00
 DATE OF MINIMUM       1994-08-19 1994-04-08 1994-04-08 1994-04-08 1994-06-08
 10TH PERCENTILE              19.         6.        1.0     13.000       0.00
 MEDIAN                       30.        13.        1.7     22.000       0.01
 90TH PERCENTILE              46.        15.        2.0     29.000       0.06
 MAXIMUM                      80.        29.        2.6     34.000       0.11
 DATE OF MAXIMUM       1995-08-30 1995-08-30 1995-08-30 1995-08-30 1994-04-08
 STANDARD DEVIATION           16.         6.        0.4      6.464       0.03




                               Fe         Ni         Se   FAEC COL       INST
                            TOTAL       DISS       DISS                DISCHG
                            26004      28102      34102      36012      97160
                          mg/L Fe    mg/L Ni    mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        0          0          7          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10          7          0         13         28
 MEAN                        0.06      0.005      0.001        53.     1048.6
 MINIMUM                     0.01      0.002      0.001         0.        0.0
 DATE OF MINIMUM       1994-06-08 1994-06-30 1994-04-08 1995-03-27 1994-11-17
 10TH PERCENTILE             0.01                               0.        0.0
 MEDIAN                      0.06      0.003      0.001        14.      448.9
 90TH PERCENTILE             0.11                             159.     2302.4
 MAXIMUM                     0.13      0.020      0.001       220.     6287.1
 DATE OF MAXIMUM       1994-11-17 1995-08-30 1995-08-30 1994-06-30 1994-04-08
 STANDARD DEVIATION          0.04      0.007      0.000        78.     1692.8





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-10 TO 1996-12-16

 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          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       25         25         13         14         25
 MEAN                       1051.       13.5        0.1        2.8       0.34
 MINIMUM                     990.       12.5        0.1        0.0       0.10
 DATE OF MINIMUM       1996-07-30 1995-06-28 1996-03-04 1995-11-07 1994-02-10
 10TH PERCENTILE            1000.       13.0        0.1        1.1       0.30
 MEDIAN                     1060.       13.5        0.1        2.5       0.30
 90TH PERCENTILE            1080.       14.0        0.1        4.1       0.40
 MAXIMUM                    1100.       14.5        0.1        5.3       0.50
 DATE OF MAXIMUM       1996-01-11 1996-09-25 1996-12-16 1996-01-11 1996-04-04
 STANDARD DEVIATION           31.        0.5        0.0        1.2       0.08




                              NH3         O2          F         pH         Na
                                        DISS       DISS                  DISS
                            07551      08102      09104      10301      11102
                           mg/L N    mg/L O2     mg/L F   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES       12          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       13         25         25         25         25
 MEAN                        0.02        7.2        0.3        7.9        95.
 MINIMUM                     0.01        6.0        0.3        7.5        84.
 DATE OF MINIMUM       1994-09-01 1994-09-01 1994-02-10 1996-12-16 1996-08-27
 10TH PERCENTILE             0.02        6.2        0.3        7.7        88.
 MEDIAN                      0.02        7.2        0.3        7.9        96.
 90TH PERCENTILE             0.03        7.6        0.4        8.0       100.
 MAXIMUM                     0.04       10.4        0.4        8.1       100.
 DATE OF MAXIMUM       1996-06-04 1996-04-04 1996-03-04 1996-08-27 1994-11-29
 STANDARD DEVIATION          0.01        0.8        0.0        0.1         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         20          0         16         20
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       25          2         25          9          5
 MEAN                         28.      0.004       8.50      0.012      0.011
 MINIMUM                      25.      0.001       7.80      0.010      0.010
 DATE OF MINIMUM       1996-04-30 1996-01-11 1994-02-10 1994-02-10 1994-02-10
 10TH PERCENTILE              26.      0.001       8.05      0.010      0.010
 MEDIAN                       28.      0.001       8.50      0.010      0.010
 90TH PERCENTILE              29.      0.010       8.95      0.020      0.010
 MAXIMUM                      30.      0.010       9.20      0.030      0.020
 DATE OF MAXIMUM       1994-06-28 1995-11-07 1996-03-28 1996-03-04 1996-06-04
 STANDARD DEVIATION            1.      0.004       0.34      0.005      0.003




                         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          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       25         25         25         25         12
 MEAN                        264.        86.        4.6     75.560      0.002
 MINIMUM                     250.        81.        4.1     69.000      0.001
 DATE OF MINIMUM       1996-06-25 1996-08-27 1996-11-05 1996-11-05 1996-03-04
 10TH PERCENTILE             250.        82.        4.2     71.500      0.001
 MEDIAN                      260.        85.        4.6     75.000      0.001
 90TH PERCENTILE             280.        90.        5.0     79.000      0.003
 MAXIMUM                     290.        92.        5.3     79.000      0.005
 DATE OF MAXIMUM       1994-11-29 1995-02-23 1994-09-01 1995-04-26 1995-11-07
 STANDARD DEVIATION           12.         3.        0.3      2.740      0.001




                               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       23         22          8          4          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          1         14         12         14
 MEAN                        0.00       0.00      0.002      0.002      0.002
 MINIMUM                     0.00       0.00      0.001      0.001      0.001
 DATE OF MINIMUM       1994-02-10 1994-02-10 1994-02-10 1995-09-28 1996-03-28
 10TH PERCENTILE             0.00       0.00      0.001      0.001      0.001
 MEDIAN                      0.00       0.00      0.002      0.002      0.002
 90TH PERCENTILE             0.00       0.00      0.003      0.003      0.003
 MAXIMUM                     0.00       0.01      0.004      0.004      0.009
 DATE OF MAXIMUM       1996-12-16 1994-09-01 1996-06-04 1996-01-11 1995-11-07
 STANDARD DEVIATION          0.00       0.00      0.001      0.001      0.002




                               As         Se   FAEC COL         Cd         Pb
                             DISS       DISS                  DISS       DISS
                            33104      34102      36012      48101      82101
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    mg/L Pb


 NO. OF L-FLAGGED VALUES        1          0          5         16         16
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       15         23          4          0          0
 MEAN                       0.002      0.002         1.      0.001      0.001
 MINIMUM                    0.001      0.002         0.      0.001      0.001
 DATE OF MINIMUM       1996-04-04 1994-02-10 1994-09-01 1995-09-28 1995-09-28
 10TH PERCENTILE            0.002      0.002                 0.001      0.001
 MEDIAN                     0.002      0.002         1.      0.001      0.001
 90TH PERCENTILE            0.003      0.003                 0.001      0.001
 MAXIMUM                    0.004      0.003         8.      0.001      0.001
 DATE OF MAXIMUM       1996-01-11 1996-04-30 1995-02-23 1996-12-16 1996-12-16
 STANDARD DEVIATION         0.001      0.000         3.      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       25
 MEAN                       482.4
 MINIMUM                    211.0
 DATE OF MINIMUM       1996-12-16
 10TH PERCENTILE            231.1
 MEDIAN                     509.8
 90TH PERCENTILE            761.8
 MAXIMUM                    810.0
 DATE OF MAXIMUM       1996-04-30
 STANDARD DEVIATION         194.3





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-07 TO 1996-06-24

 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       20         20         16         18         15
 MEAN                        252.       16.3        5.7       1.32       0.05
 MINIMUM                     175.        2.0        0.0       0.50       0.01
 DATE OF MINIMUM       1996-06-20 1994-02-07 1995-05-15 1994-07-08 1994-06-09
 10TH PERCENTILE             188.        2.1        1.0       0.74       0.01
 MEDIAN                      228.       18.6        3.4       1.30       0.05
 90TH PERCENTILE             324.       24.5       12.0       1.82       0.08
 MAXIMUM                     414.       30.0       25.0       2.10       0.11
 DATE OF MAXIMUM       1994-11-17 1994-07-08 1995-01-25 1996-06-24 1996-06-22
 STANDARD DEVIATION           63.        9.2        6.9       0.43       0.03




                               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          8          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         11         20         19         19
 MEAN                        10.1        0.1        7.8         7.         7.
 MINIMUM                      7.1        0.1        7.1         4.         4.
 DATE OF MINIMUM       1994-07-08 1994-02-07 1994-03-01 1994-04-05 1996-01-23
 10TH PERCENTILE              7.2        0.1        7.3         4.         4.
 MEDIAN                       9.0        0.1        7.7         6.         6.
 90TH PERCENTILE             14.2        0.1        8.3        11.        11.
 MAXIMUM                     14.6        0.2        8.7        15.        12.
 DATE OF MAXIMUM       1994-02-07 1994-07-08 1994-09-13 1994-11-09 1994-11-09
 STANDARD DEVIATION           2.6        0.0        0.4         3.         3.




                               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        0          0          1          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3         19         17         14         19
 MEAN                       0.017       4.89      0.106      0.043        25.
 MINIMUM                                0.50      0.010      0.010        13.
 DATE OF MINIMUM                  1995-04-06 1994-09-13 1994-04-05 1996-06-20
 10TH PERCENTILE                        0.77      0.010      0.010        14.
 MEDIAN                                 6.50      0.040      0.020        22.
 90TH PERCENTILE                        7.52      0.241      0.062        34.
 MAXIMUM                                7.70      0.600      0.280        43.
 DATE OF MAXIMUM                  1996-06-24 1996-06-20 1995-06-29 1994-11-09
 STANDARD DEVIATION                     2.74      0.146      0.064         8.




                               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          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         19         19          3         18
 MEAN                         11.        2.4     30.158      0.002       0.01
 MINIMUM                       7.        1.3     21.000                  0.00
 DATE OF MINIMUM       1994-03-16 1994-04-05 1996-06-20            1994-05-03
 10TH PERCENTILE               7.        1.7     21.900                  0.00
 MEDIAN                       10.        2.4     29.000                  0.01
 90TH PERCENTILE              17.        3.3     39.200                  0.01
 MAXIMUM                      21.        3.7     46.000                  0.02
 DATE OF MAXIMUM       1994-11-09 1994-11-09 1994-11-09            1994-02-07
 STANDARD DEVIATION            4.        0.7      6.874                  0.01




                               Fe         Ni         Cu         Zn         Se
                            TOTAL       DISS       DISS       DISS       DISS
                            26004      28102      29105      30104      34102
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn    mg/L Se


 NO. OF L-FLAGGED VALUES        0          2          1          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19          1          2          3          0
 MEAN                        0.05      0.001      0.002      0.002      0.001
 MINIMUM                     0.01                                            
 DATE OF MINIMUM       1994-02-07                                            
 10TH PERCENTILE             0.01                                            
 MEDIAN                      0.04                                            
 90TH PERCENTILE             0.11                                            
 MAXIMUM                     0.15                                            
 DATE OF MAXIMUM       1995-06-29                                            
 STANDARD DEVIATION          0.04                                            




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


 NO. OF L-FLAGGED VALUES        0          3          3          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        3          0          0         15
 MEAN                         37.      0.001      0.001      675.9
 MINIMUM                                                      61.2
 DATE OF MINIMUM                                        1994-09-13
 10TH PERCENTILE                                              65.2
 MEDIAN                                                      573.2
 90TH PERCENTILE                                            1557.2
 MAXIMUM                                                    2010.7
 DATE OF MAXIMUM                                        1996-06-20
 STANDARD DEVIATION                                          668.5





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-01 TO 1996-11-21

 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       28         28          3         14         18
 MEAN                        168.       16.4        0.1        2.6       0.91
 MINIMUM                     110.        1.5        0.0        1.9       0.70
 DATE OF MINIMUM       1994-04-11 1994-03-01 1996-11-21 1995-03-28 1994-04-14
 10TH PERCENTILE             126.        3.3                   2.0       0.70
 MEDIAN                      170.       20.0        0.2        2.3       0.90
 90TH PERCENTILE             203.       29.5                   3.0       1.02
 MAXIMUM                     214.       30.5        0.2        5.1       1.50
 DATE OF MAXIMUM       1996-02-21 1995-08-03 1995-05-16 1994-08-23 1996-02-21
 STANDARD DEVIATION           31.       10.3        0.1        0.8       0.19




                              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        6          0          3         17          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         28         10          1          4
 MEAN                        0.04       10.4         2.        0.1      30.25
 MINIMUM                     0.00        7.3         1.        0.1      23.00
 DATE OF MINIMUM       1995-03-28 1996-06-17 1994-03-01 1994-03-01 1994-04-14
 10TH PERCENTILE             0.01        7.8         1.        0.1           
 MEDIAN                      0.03        8.9         2.        0.1      32.00
 90TH PERCENTILE             0.06       13.4         3.        0.1           
 MAXIMUM                     0.08       14.1         6.        0.2      34.00
 DATE OF MAXIMUM       1994-03-10 1994-03-23 1995-08-03 1995-11-30 1994-03-23
 STANDARD DEVIATION          0.02        2.4         1.        0.0       4.99




                              ALK         pH         Na         Mg         Al
                            TOTAL                  DISS       DISS       DISS
                            10121      10301      11102      12102      13102
                            MEQ/L   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        7         27         18         18          7
 MEAN                       38.14        7.8         9.         5.      0.034
 MINIMUM                    23.00        7.2         6.         3.      0.020
 DATE OF MINIMUM       1994-04-14 1994-08-23 1994-04-11 1994-04-11 1995-05-16
 10TH PERCENTILE                         7.3         6.         3.           
 MEDIAN                     42.00        7.9         9.         4.      0.030
 90TH PERCENTILE                         8.3        11.         6.           
 MAXIMUM                    48.00        8.6        12.         7.      0.050
 DATE OF MAXIMUM       1995-05-16 1996-04-10 1996-02-21 1996-02-21 1994-08-23
 STANDARD DEVIATION         10.53        0.4         2.         1.      0.010




                               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          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       18         18         17         18         18
 MEAN                        4.04      0.074      0.033        16.        14.
 MINIMUM                     1.60      0.020      0.010        12.         9.
 DATE OF MINIMUM       1994-11-22 1996-04-10 1994-03-01 1994-04-11 1994-04-11
 10TH PERCENTILE             2.56      0.020      0.010        12.         9.
 MEDIAN                      4.30      0.065      0.030        16.        14.
 90TH PERCENTILE             5.23      0.114      0.051        19.        18.
 MAXIMUM                     6.20      0.220      0.070        21.        20.
 DATE OF MAXIMUM       1996-02-21 1994-08-23 1994-08-23 1995-08-03 1996-02-21
 STANDARD DEVIATION          1.12      0.049      0.018         3.         3.




                          LINDANE          K         Ca         Cr         Mn
                                        DISS       DISS      TOTAL      TOTAL
                            18070      19102      20103      24002      25004
                             ug/L     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        6          0          0          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         18         18          0          4
 MEAN                       0.030        1.3     14.433      0.001       0.04
 MINIMUM                    0.030        0.8      9.800      0.001       0.02
 DATE OF MINIMUM       1995-11-30 1994-04-11 1994-04-11 1994-11-22 1994-11-22
 10TH PERCENTILE                         0.9      9.960                      
 MEDIAN                     0.030        1.2     14.000      0.001       0.02
 90TH PERCENTILE                         1.6     18.000                      
 MAXIMUM                    0.030        1.8     19.000      0.001       0.09
 DATE OF MAXIMUM       1996-11-21 1994-08-23 1996-02-21 1996-11-21 1996-06-17
 STANDARD DEVIATION         0.000        0.3      2.789      0.000       0.03




                               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        0          0          0          1          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          7          4          7          4
 MEAN                        0.01       0.04       0.16      0.001      0.001
 MINIMUM                     0.00       0.02       0.09      0.001      0.001
 DATE OF MINIMUM       1994-06-15 1994-06-15 1994-11-22 1994-11-22 1994-06-15
 10TH PERCENTILE                                                             
 MEDIAN                      0.01       0.03       0.11      0.001      0.001
 90TH PERCENTILE                                                             
 MAXIMUM                     0.02       0.07       0.32      0.002      0.002
 DATE OF MAXIMUM       1994-03-01 1994-08-23 1996-06-17 1996-02-21 1994-03-01
 STANDARD DEVIATION          0.01       0.02       0.11      0.000      0.000



                               Cu         Zn         As         Se         Se
                            TOTAL      TOTAL      TOTAL      TOTAL       DISS
                            29006      30004      33003      34002      34102
                          mg/L Cu    mg/L Zn    mg/L As    mg/L Se    mg/L Se


 NO. OF L-FLAGGED VALUES        0          1          3          4          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          7          1          0          0
 MEAN                       0.002      0.021      0.001      0.001      0.001
 MINIMUM                    0.001      0.010      0.001      0.001      0.001
 DATE OF MINIMUM       1994-11-22 1994-11-22 1994-11-22 1994-11-22 1994-03-01
 10TH PERCENTILE                                                             
 MEDIAN                     0.002      0.020      0.001      0.001      0.001
 90TH PERCENTILE                                                             
 MAXIMUM                    0.003      0.040      0.002      0.001      0.002
 DATE OF MAXIMUM       1996-06-17 1996-04-10 1995-05-16 1996-11-21 1995-08-03
 STANDARD DEVIATION         0.001      0.011      0.001      0.000      0.000




                         FAEC COL         Cd         Ba         Pb    BENZENE
                                       TOTAL      TOTAL      TOTAL           
                            36012      48001      80016      82001      95100
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb       ug/L


 NO. OF L-FLAGGED VALUES        0          4          8          5          5
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          0          0          3          0
 MEAN                         92.      0.001      0.100      0.002        0.2
 MINIMUM                       4.      0.001      0.100      0.001        0.2
 DATE OF MINIMUM       1994-03-01 1994-11-22 1994-11-22 1994-11-22 1995-11-30
 10TH PERCENTILE                                                             
 MEDIAN                       66.      0.001      0.100      0.001        0.2
 90TH PERCENTILE                                                             
 MAXIMUM                     240.      0.001      0.100      0.003        0.2
 DATE OF MAXIMUM       1994-06-15 1996-11-21 1996-11-21 1996-02-21 1996-08-07
 STANDARD DEVIATION           99.      0.000      0.000      0.001        0.0




                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       15
 MEAN                       522.3
 MINIMUM                    111.9
 DATE OF MINIMUM       1995-08-03
 10TH PERCENTILE            121.2
 MEDIAN                     300.2
 90TH PERCENTILE           1052.1
 MAXIMUM                   1704.9
 DATE OF MAXIMUM       1994-04-14
 STANDARD DEVIATION         448.9





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-02-03 TO 1995-09-27

 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       15         15          8          8         15
 MEAN                        296.       19.7       0.86       0.06        8.1
 MINIMUM                     213.        2.3       0.40       0.02        5.2
 DATE OF MINIMUM       1994-04-05 1994-02-03 1994-10-25 1995-04-05 1995-06-07
 10TH PERCENTILE             226.        2.5                              5.3
 MEDIAN                      313.       23.0       0.80       0.06        6.4
 90TH PERCENTILE             334.       29.8                             12.1
 MAXIMUM                     335.       30.1       1.40       0.13       15.0
 DATE OF MAXIMUM       1995-04-05 1995-08-22 1995-06-06 1994-02-03 1994-02-03
 STANDARD DEVIATION           37.        9.4       0.33       0.03        3.1




                                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        1          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         15          8          8          5
 MEAN                         0.1        7.6         9.         7.      0.053
 MINIMUM                      0.1        7.0         6.         5.      0.010
 DATE OF MINIMUM       1994-02-03 1995-06-07 1994-04-05 1994-04-05 1994-06-08
 10TH PERCENTILE                         7.1                                 
 MEDIAN                       0.1        7.4         9.         6.      0.040
 90TH PERCENTILE                         8.3                                 
 MAXIMUM                      0.2        8.5        12.        10.      0.130
 DATE OF MAXIMUM       1995-06-06 1995-02-16 1995-04-05 1995-04-05 1994-04-05
 STANDARD DEVIATION           0.0        0.5         2.         2.      0.048




                               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          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          8          8          8          8
 MEAN                        4.72      0.111      0.046        32.        12.
 MINIMUM                     0.90      0.050      0.010        24.         7.
 DATE OF MINIMUM       1994-06-08 1995-04-05 1994-06-08 1995-02-16 1994-04-05
 10TH PERCENTILE                                                             
 MEDIAN                      5.05      0.085      0.045        32.        12.
 90TH PERCENTILE                                                             
 MAXIMUM                     6.50      0.300      0.080        44.        17.
 DATE OF MAXIMUM       1994-02-03 1994-02-03 1995-02-16 1995-04-05 1995-04-05
 STANDARD DEVIATION          1.66      0.083      0.022         6.         3.




                                K         Ca         Mn         Fe         Ni
                             DISS       DISS       DISS      TOTAL       DISS
                            19102      20103      25104      26004      28102
                           mg/L K    mg/L Ca    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          8          6          6          5
 MEAN                         2.2     30.125       0.00       0.04      0.002
 MINIMUM                      1.7     24.000       0.00       0.01      0.001
 DATE OF MINIMUM       1994-04-05 1994-10-25 1994-06-08 1994-06-08 1994-04-05
 10TH PERCENTILE                                                             
 MEDIAN                       2.1     28.500       0.00       0.04      0.002
 90TH PERCENTILE                                                             
 MAXIMUM                      2.7     38.000       0.01       0.10      0.002
 DATE OF MAXIMUM       1995-06-06 1995-04-05 1994-10-25 1994-04-05 1995-06-06
 STANDARD DEVIATION           0.4      5.303       0.01       0.04      0.001




                               Se   FAEC COL       INST
                             DISS                DISCHG
                            34102      36012      97160
                          mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        6          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        0          7         13
 MEAN                       0.001       252.     9591.4
 MINIMUM                    0.001         8.     2758.4
 DATE OF MINIMUM       1994-04-05 1995-04-05 1995-07-25
 10TH PERCENTILE                                 2758.4
 MEDIAN                     0.001       152.     6711.9
 90TH PERCENTILE                                20911.4
 MAXIMUM                    0.001       766.    26309.3
 DATE OF MAXIMUM       1995-06-06 1995-02-16 1994-04-05
 STANDARD DEVIATION         0.000       289.     8170.1





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-01-19 TO 1996-11-13

 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         11
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       15         15         10         11          4
 MEAN                       1543.       27.0        0.4        4.1       0.07
 MINIMUM                    1227.       22.0        0.3        3.5       0.01
 DATE OF MINIMUM       1995-10-17 1995-03-01 1996-03-19 1996-06-11 1996-11-13
 10TH PERCENTILE            1294.       22.0        0.3        3.5       0.03
 MEDIAN                     1520.       28.5        0.4        4.0       0.05
 90TH PERCENTILE            1775.       30.5        0.4        4.6       0.09
 MAXIMUM                    1930.       32.0        0.4        5.0       0.30
 DATE OF MAXIMUM       1996-07-23 1995-07-24 1996-07-23 1996-07-23 1996-05-02
 STANDARD DEVIATION          182.        3.5        0.1        0.4       0.07




                              NH3         O2        BOD          F         pH
                                        DISS                  DISS           
                            07551      08102      08201      09104      10301
                           mg/L N    mg/L O2    mg/L O2     mg/L F   pH UNITS


 NO. OF L-FLAGGED VALUES        9          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6         15          4         15         15
 MEAN                        0.03        7.4         4.        0.8        8.2
 MINIMUM                     0.00        5.0         3.        0.4        7.8
 DATE OF MINIMUM       1996-11-13 1996-07-23 1995-05-22 1995-10-17 1995-03-01
 10TH PERCENTILE             0.01        5.6                   0.5        7.9
 MEDIAN                      0.02        7.4         4.        0.9        8.2
 90TH PERCENTILE             0.04        8.9                   0.9        8.3
 MAXIMUM                     0.09        9.8         6.        1.1        8.5
 DATE OF MAXIMUM       1996-09-24 1995-03-01 1995-08-30 1995-05-22 1995-07-24
 STANDARD DEVIATION          0.02        1.2         1.        0.2        0.2




                               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          8          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       15         15          5         15         15
 MEAN                        172.        27.      0.003      13.29      0.131
 MINIMUM                     130.        21.      0.001       9.60      0.050
 DATE OF MINIMUM       1995-10-17 1995-10-17 1996-03-19 1996-05-28 1996-08-20
 10TH PERCENTILE             140.        22.      0.001       9.70      0.055
 MEDIAN                      170.        27.      0.002      13.00      0.120
 90TH PERCENTILE             195.        31.      0.010      15.50      0.210
 MAXIMUM                     210.        34.      0.010      19.00      0.230
 DATE OF MAXIMUM       1996-07-23 1996-11-13 1995-10-17 1996-07-23 1996-06-25
 STANDARD DEVIATION           20.         4.      0.004       2.47      0.057




                          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        5          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       10         15         15         15         15
 MEAN                       0.038       292.       206.        6.8     78.333
 MINIMUM                    0.010       210.       150.        6.1     20.000
 DATE OF MINIMUM       1995-03-01 1995-10-17 1995-10-17 1995-05-22 1996-11-13
 10TH PERCENTILE            0.010       220.       160.        6.1     44.500
 MEDIAN                     0.020       300.       200.        6.5     81.000
 90TH PERCENTILE            0.090       325.       240.        7.4     90.500
 MAXIMUM                    0.120       330.       280.        7.5     96.000
 DATE OF MAXIMUM       1996-09-24 1996-11-13 1996-11-13 1996-07-23 1996-04-17
 STANDARD DEVIATION         0.036        35.        31.        0.5     17.622




                               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         14          8          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8          1          6         13         11
 MEAN                       0.002       0.00       0.00      0.002      0.002
 MINIMUM                    0.001       0.00       0.00      0.001      0.001
 DATE OF MINIMUM       1996-05-28 1995-03-01 1995-07-24 1995-03-01 1995-10-17
 10TH PERCENTILE            0.001       0.00       0.00      0.001      0.001
 MEDIAN                     0.001       0.00       0.00      0.002      0.002
 90TH PERCENTILE            0.002       0.00       0.01      0.003      0.003
 MAXIMUM                    0.005       0.00       0.02      0.004      0.003
 DATE OF MAXIMUM       1995-10-17 1996-11-13 1996-05-02 1996-08-20 1996-05-28
 STANDARD DEVIATION         0.001       0.00       0.01      0.001      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          0         14          0         11
 NO. OF G-FLAGGED VALUES        0          0          0          1          0
 NO. OF UNFLAGGED VALUES       10         11          1          3          0
 MEAN                       0.003      0.004      0.001       388.      0.001
 MINIMUM                    0.002      0.003      0.001        42.      0.001
 DATE OF MINIMUM       1996-03-19 1996-03-19 1995-03-01 1995-07-24 1995-10-17
 10TH PERCENTILE            0.002      0.003      0.001                 0.001
 MEDIAN                     0.003      0.004      0.001       155.      0.001
 90TH PERCENTILE            0.004      0.006      0.001                 0.001
 MAXIMUM                    0.004      0.007      0.001      1200.      0.001
 DATE OF MAXIMUM       1996-05-28 1996-09-24 1996-11-13 1995-08-30 1996-11-13
 STANDARD DEVIATION         0.001      0.001      0.000       544.      0.000



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


 NO. OF L-FLAGGED VALUES       11          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0         22
 MEAN                       0.001        5.5
 MINIMUM                    0.001        0.0
 DATE OF MINIMUM       1995-10-17 1995-10-17
 10TH PERCENTILE            0.001        0.1
 MEDIAN                     0.001        3.5
 90TH PERCENTILE            0.001        8.3
 MAXIMUM                    0.001       29.2
 DATE OF MAXIMUM       1996-11-13 1994-05-18
 STANDARD DEVIATION         0.000        7.9





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-15 TO 1996-10-10

 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          1          8
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       30         42          7         13          6
 MEAN                        132.       17.3        1.7       0.11       0.02
 MINIMUM                      75.        8.0        1.4       0.05       0.01
 DATE OF MINIMUM       1995-03-16 1994-12-13 1996-05-13 1994-06-14 1995-09-13
 10TH PERCENTILE              86.        8.0                  0.05       0.02
 MEDIAN                      125.       19.0        1.5       0.10       0.02
 90TH PERCENTILE             193.       22.5                  0.15       0.03
 MAXIMUM                     197.       22.8        2.8       0.30       0.03
 DATE OF MAXIMUM       1994-03-15 1994-06-14 1996-02-20 1994-12-13 1996-08-16
 STANDARD DEVIATION           40.        4.7        0.5       0.07       0.00




                               O2          F        ALK        ALK         pH
                             DISS       DISS      TOTAL      TOTAL           
                            08102      09104      10101      10121      10301
                          mg/L O2     mg/L F       mg/L      MEQ/L   pH UNITS


 NO. OF L-FLAGGED VALUES        0         14          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       28          0          2          1         25
 MEAN                         9.2        0.1       0.02       0.00        7.6
 MINIMUM                      8.2        0.1                              6.8
 DATE OF MINIMUM       1994-06-14 1994-03-15                       1995-03-16
 10TH PERCENTILE              8.2        0.1                              7.4
 MEDIAN                       9.1        0.1                              7.7
 90TH PERCENTILE              9.8        0.1                              7.9
 MAXIMUM                     11.1        0.1                              7.9
 DATE OF MAXIMUM       1995-03-16 1996-09-24                       1994-12-13
 STANDARD DEVIATION           0.7        0.0                              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          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14         14         14         14         14
 MEAN                          7.         6.      0.028      16.43      0.045
 MINIMUM                       3.         3.      0.005      13.00      0.020
 DATE OF MINIMUM       1995-03-16 1995-03-16 1996-09-24 1995-03-16 1996-05-13
 10TH PERCENTILE               3.         3.      0.005      13.40      0.020
 MEDIAN                        6.         5.      0.015      16.00      0.040
 90TH PERCENTILE              12.         8.      0.075      18.50      0.070
 MAXIMUM                      12.         8.      0.100      21.00      0.080
 DATE OF MAXIMUM       1994-12-13 1994-03-15 1994-12-13 1994-12-13 1996-03-22
 STANDARD DEVIATION            3.         2.      0.031       2.14      0.021





                          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        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         14         14         14         14
 MEAN                       0.023         5.         5.        1.1     10.564
 MINIMUM                    0.010         2.         2.        0.8      6.900
 DATE OF MINIMUM       1994-06-14 1995-03-16 1995-03-16 1996-04-01 1995-03-16
 10TH PERCENTILE            0.010         2.         2.        0.8      7.340
 MEDIAN                     0.020         6.         4.        0.9     10.000
 90TH PERCENTILE            0.045         8.         8.        1.3     14.000
 MAXIMUM                    0.050        10.        11.        2.2     15.000
 DATE OF MAXIMUM       1995-09-13 1994-03-15 1994-12-13 1994-12-13 1994-12-13
 STANDARD DEVIATION         0.015         2.         3.        0.4      2.414




                               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        5          2          0         11          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2         12         14          3          7
 MEAN                       0.001       0.00       0.04      0.001      0.001
 MINIMUM                    0.001       0.00       0.01      0.001      0.001
 DATE OF MINIMUM       1996-02-20 1994-12-13 1994-06-14 1994-03-15 1996-02-20
 10TH PERCENTILE                        0.00       0.01      0.001           
 MEDIAN                     0.001       0.00       0.01      0.001      0.001
 90TH PERCENTILE                        0.01       0.09      0.001           
 MAXIMUM                    0.002       0.01       0.16      0.004      0.001
 DATE OF MAXIMUM       1996-05-13 1994-09-14 1995-03-16 1995-06-14 1996-09-24
 STANDARD DEVIATION         0.000       0.00       0.05      0.001      0.000




                               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        3          4         14          0          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          3          0          6          0
 MEAN                       0.001      0.001      0.001        80.      0.001
 MINIMUM                    0.001      0.001      0.001         7.      0.001
 DATE OF MINIMUM       1996-03-22 1996-02-20 1994-03-15 1994-06-14 1996-02-20
 10TH PERCENTILE                                  0.001                      
 MEDIAN                     0.001      0.001      0.001        28.      0.001
 90TH PERCENTILE                                  0.001                      
 MAXIMUM                    0.003      0.001      0.001       310.      0.001
 DATE OF MAXIMUM       1996-02-20 1996-09-24 1996-09-24 1995-03-16 1996-09-24
 STANDARD DEVIATION         0.001      0.000      0.000       117.      0.000




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


 NO. OF L-FLAGGED VALUES        7          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0         49
 MEAN                       0.001     1215.6
 MINIMUM                    0.001      328.5
 DATE OF MINIMUM       1996-02-20 1994-06-14
 10TH PERCENTILE                       427.6
 MEDIAN                     0.001      693.8
 90TH PERCENTILE                      2197.6
 MAXIMUM                    0.001     2429.9
 DATE OF MAXIMUM       1996-09-24 1995-03-16
 STANDARD DEVIATION         0.000      765.5





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-01-04 TO 1996-12-10

 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          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES      106        106         12         15         26
 MEAN                        545.       18.8        0.1        4.3       0.28
 MINIMUM                     184.        3.5        0.0        3.4       0.05
 DATE OF MINIMUM       1994-01-04 1996-01-10 1996-06-10 1996-08-12 1994-08-01
 10TH PERCENTILE             387.        3.7        0.0        3.5       0.07
 MEDIAN                      440.       21.5        0.1        3.8       0.30
 90TH PERCENTILE             698.       30.0        0.1        4.7       0.40
 MAXIMUM                    1266.       31.2        0.1        9.9       0.60
 DATE OF MAXIMUM       1996-10-07 1994-06-30 1996-05-15 1996-10-07 1994-06-02
 STANDARD DEVIATION          180.        9.6        0.1        1.6       0.14




                              NH3         O2          F         pH         Na
                                        DISS       DISS                  DISS
                            07551      08102      09104      10301      11102
                           mg/L N    mg/L O2     mg/L F   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES        2          0          3          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       26        106         25        106         28
 MEAN                        0.08        8.7        0.2        7.8        56.
 MINIMUM                     0.01        3.9        0.1        7.1        11.
 DATE OF MINIMUM       1995-12-13 1994-06-30 1994-01-04 1994-06-30 1994-01-04
 10TH PERCENTILE             0.02        5.9        0.1        7.4        21.
 MEDIAN                      0.07        7.5        0.2        7.9        44.
 90TH PERCENTILE             0.13       12.0        0.2        8.4       100.
 MAXIMUM                     0.21       12.6        0.3        8.6       190.
 DATE OF MAXIMUM       1994-01-04 1996-02-12 1995-12-13 1994-06-30 1996-10-07
 STANDARD DEVIATION          0.05        2.4        0.1        0.3        40.




                               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          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       28         22         28         28         27
 MEAN                          8.      0.020       4.73      0.081      0.043
 MINIMUM                       4.      0.002       0.20      0.030      0.010
 DATE OF MINIMUM       1994-01-04 1996-03-12 1994-08-01 1995-04-20 1996-06-24
 10TH PERCENTILE               5.      0.003       1.32      0.038      0.018
 MEDIAN                        7.      0.007       5.00      0.080      0.040
 90TH PERCENTILE              10.      0.040       7.02      0.111      0.080
 MAXIMUM                      12.      0.160       8.20      0.180      0.100
 DATE OF MAXIMUM       1996-09-09 1994-12-05 1995-08-24 1996-11-27 1995-12-13
 STANDARD DEVIATION            2.      0.034       2.07      0.033      0.023




                         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         11
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       28         28         28         28          6
 MEAN                         39.        83.        3.4     29.893      0.002
 MINIMUM                      17.        15.        2.2     16.000      0.001
 DATE OF MINIMUM       1994-01-04 1994-01-04 1994-02-17 1994-01-04 1996-01-10
 10TH PERCENTILE              23.        27.        2.4     18.800      0.001
 MEDIAN                       34.        64.        3.2     30.000      0.001
 90TH PERCENTILE              61.       153.        4.6     38.300      0.005
 MAXIMUM                      79.       290.        5.0     44.000      0.005
 DATE OF MAXIMUM       1996-10-07 1996-10-07 1995-10-13 1995-10-13 1995-12-13
 STANDARD DEVIATION           15.        62.        0.8      7.320      0.002




                               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        5          6          4          0          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         18         20         17         13
 MEAN                        0.00       0.02      0.002      0.002      0.003
 MINIMUM                     0.00       0.00      0.001      0.001      0.001
 DATE OF MINIMUM       1994-06-02 1995-09-26 1994-06-02 1996-05-15 1996-03-12
 10TH PERCENTILE             0.00       0.00      0.001      0.001      0.001
 MEDIAN                      0.00       0.02      0.002      0.002      0.003
 90TH PERCENTILE             0.01       0.05      0.002      0.003      0.004
 MAXIMUM                     0.02       0.13      0.005      0.008      0.013
 DATE OF MAXIMUM       1996-01-10 1994-12-05 1996-01-10 1996-04-11 1995-10-13
 STANDARD DEVIATION          0.01       0.03      0.001      0.002      0.003




                               As         Se   FAEC COL         Cd         Pb
                             DISS       DISS                  DISS       DISS
                            33104      34102      36012      48101      82101
                          mg/L As    mg/L Se   No/100ml    mg/L Cd    mg/L Pb


 NO. OF L-FLAGGED VALUES        6         24          0         15         17
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11          0         11          2          0
 MEAN                       0.001      0.001        79.      0.001      0.001
 MINIMUM                    0.001      0.001         9.      0.001      0.001
 DATE OF MINIMUM       1995-12-13 1994-06-02 1994-08-01 1995-09-26 1995-09-26
 10TH PERCENTILE            0.001      0.001        10.      0.001      0.001
 MEDIAN                     0.001      0.001        24.      0.001      0.001
 90TH PERCENTILE            0.002      0.001       132.      0.001      0.001
 MAXIMUM                    0.002      0.002       470.      0.002      0.001
 DATE OF MAXIMUM       1995-10-13 1995-09-26 1994-01-04 1995-10-13 1996-12-10
 STANDARD DEVIATION         0.000      0.000       135.      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       28
 MEAN                       980.1
 MINIMUM                     24.9
 DATE OF MINIMUM       1995-12-13
 10TH PERCENTILE             82.0
 MEDIAN                     349.8
 90TH PERCENTILE           2367.0
 MAXIMUM                   5947.2
 DATE OF MAXIMUM       1996-11-27
 STANDARD DEVIATION        1287.5





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-11 TO 1994-11-14

 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          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          3          4          4          2
 MEAN                        181.       14.3        1.5       0.40       0.02
 MINIMUM                                            1.1       0.20       0.01
 DATE OF MINIMUM                             1994-11-14 1994-07-29 1994-05-26
 10TH PERCENTILE                                                             
 MEDIAN                                             1.4       0.45       0.01
 90TH PERCENTILE                                                             
 MAXIMUM                                            2.3       0.50       0.03
 DATE OF MAXIMUM                             1994-03-11 1994-11-14 1994-03-11
 STANDARD DEVIATION                                 0.5       0.14       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        3          4          3          4          4
 MEAN                         9.1        0.4        8.3         7.         3.
 MINIMUM                                 0.3                    6.         3.
 DATE OF MINIMUM                  1994-03-11            1994-05-26 1994-05-26
 10TH PERCENTILE                                                             
 MEDIAN                                  0.3                    7.         3.
 90TH PERCENTILE                                                             
 MAXIMUM                                 0.9                    7.         4.
 DATE OF MAXIMUM                  1994-07-29            1994-03-11 1994-03-11
 STANDARD DEVIATION                      0.3                    0.         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        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          4          4          4          4
 MEAN                       0.027      53.25      0.175      0.127         6.
 MINIMUM                    0.020      52.00      0.160      0.120         6.
 DATE OF MINIMUM       1994-03-11 1994-11-14 1994-03-11 1994-05-26 1994-03-11
 10TH PERCENTILE                                                             
 MEDIAN                     0.025      53.00      0.170      0.125         6.
 90TH PERCENTILE                                                             
 MAXIMUM                    0.040      55.00      0.200      0.140         6.
 DATE OF MAXIMUM       1994-07-29 1994-07-29 1994-07-29 1994-11-14 1994-11-14
 STANDARD DEVIATION         0.010       1.26      0.019      0.010         0.





                               Cl          K         Ca         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      25104      26004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          4          4          4          4
 MEAN                          1.        4.8     22.250       0.00       0.02
 MINIMUM                       1.        4.3     21.000       0.00       0.01
 DATE OF MINIMUM       1994-03-11 1994-11-14 1994-05-26 1994-03-11 1994-11-14
 10TH PERCENTILE                                                             
 MEDIAN                        1.        4.8     22.500       0.00       0.02
 90TH PERCENTILE                                                             
 MAXIMUM                       1.        5.2     23.000       0.00       0.04
 DATE OF MAXIMUM       1994-11-14 1994-03-11 1994-11-14 1994-11-14 1994-03-11
 STANDARD DEVIATION            0.        0.4      0.957       0.00       0.01




                               Ni         Se   FAEC COL       INST
                             DISS       DISS                DISCHG
                            28102      34102      36012      97160
                          mg/L Ni    mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        4          4          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0          2          3
 MEAN                       0.001      0.001       176.        6.1
 MINIMUM                    0.001      0.001                      
 DATE OF MINIMUM       1994-03-11 1994-03-11                      
 10TH PERCENTILE                                                  
 MEDIAN                     0.001      0.001                      
 90TH PERCENTILE                                                  
 MAXIMUM                    0.001      0.001                      
 DATE OF MAXIMUM       1994-11-14 1994-11-14                      
 STANDARD DEVIATION         0.000      0.000                      





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-18 TO 1995-09-05

 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        6          7          7          7          6
 MEAN                        107.       21.6       0.41       0.03        9.8
 MINIMUM                      65.       16.5       0.30       0.02        8.3
 DATE OF MINIMUM       1994-05-12 1994-03-18 1995-09-05 1994-05-12 1994-09-06
 10TH PERCENTILE                                                             
 MEDIAN                      109.       19.0       0.40       0.03        9.2
 90TH PERCENTILE                                                             
 MAXIMUM                     142.       28.0       0.60       0.05       12.2
 DATE OF MAXIMUM       1995-06-28 1995-06-28 1995-04-05 1995-06-28 1994-12-01
 STANDARD DEVIATION           25.        5.1       0.09       0.01        1.6




                                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          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          6          7          7          6
 MEAN                         0.1        7.7         5.         1.      0.140
 MINIMUM                      0.1        7.4         4.         1.      0.010
 DATE OF MINIMUM       1994-03-18 1994-03-18 1994-03-18 1994-03-18 1995-06-28
 10TH PERCENTILE                                                             
 MEDIAN                       0.1        7.6         5.         1.      0.040
 90TH PERCENTILE                                                             
 MAXIMUM                      0.1        8.0         8.         2.      0.670
 DATE OF MAXIMUM       1995-09-05 1995-09-05 1995-09-05 1995-09-05 1994-03-18
 STANDARD DEVIATION           0.0        0.2         1.         0.      0.239




                               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          0          4          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          7          3          7          7
 MEAN                        6.94      0.033      0.016         6.         5.
 MINIMUM                     6.00      0.020      0.010         5.         4.
 DATE OF MINIMUM       1994-05-12 1994-05-12 1994-05-12 1994-03-18 1994-03-18
 10TH PERCENTILE                                                             
 MEDIAN                      7.00      0.030      0.010         6.         4.
 90TH PERCENTILE                                                             
 MAXIMUM                     7.60      0.060      0.030         7.         6.
 DATE OF MAXIMUM       1994-09-06 1994-12-01 1994-03-18 1995-09-05 1995-09-05
 STANDARD DEVIATION          0.51      0.016      0.008         1.         1.




                                K         Ca         Mn         Fe         Ni
                             DISS       DISS       DISS      TOTAL       DISS
                            19102      20103      25104      26004      28102
                           mg/L K    mg/L Ca    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          0          1          0          7
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          7          6          7          0
 MEAN                         1.3     15.714       0.01       0.23      0.001
 MINIMUM                      1.2     13.000       0.00       0.01      0.001
 DATE OF MINIMUM       1994-03-18 1994-05-12 1994-05-12 1995-09-05 1994-03-18
 10TH PERCENTILE                                                             
 MEDIAN                       1.3     15.000       0.01       0.21      0.001
 90TH PERCENTILE                                                             
 MAXIMUM                      1.7     19.000       0.02       0.50      0.001
 DATE OF MAXIMUM       1994-12-01 1995-09-05 1994-12-01 1994-03-18 1995-09-05
 STANDARD DEVIATION           0.2      2.498       0.01       0.18      0.000




                               Se   FAEC COL       INST
                             DISS                DISCHG
                            34102      36012      97160
                          mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        7          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        0          7          7
 MEAN                       0.001        58.      541.8
 MINIMUM                    0.001         7.      212.7
 DATE OF MINIMUM       1994-03-18 1994-09-06 1995-09-05
 10TH PERCENTILE                                       
 MEDIAN                     0.001        48.      557.9
 90TH PERCENTILE                                       
 MAXIMUM                    0.001       160.     1059.2
 DATE OF MAXIMUM       1995-09-05 1994-12-01 1994-12-01
 STANDARD DEVIATION         0.000        55.      281.3





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-24 TO 1996-03-29

 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          4          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       53         52          9          5         45
 MEAN                        132.        5.1       0.26       0.02       11.3
 MINIMUM                       0.        0.0       0.10       0.01        0.0
 DATE OF MINIMUM       1994-03-24 1994-03-24 1994-07-14 1995-04-12 1994-03-24
 10TH PERCENTILE              89.        0.0                              5.3
 MEDIAN                      119.        3.5       0.30       0.02       11.6
 90TH PERCENTILE             202.       12.3                             14.0
 MAXIMUM                     217.       13.5       0.40       0.04       14.1
 DATE OF MAXIMUM       1995-02-07 1994-07-14 1995-04-12 1994-08-10 1995-10-20
 STANDARD DEVIATION           55.        5.1       0.13       0.01        3.8




                                F        ALK         pH         Na         Mg
                             DISS      TOTAL                  DISS       DISS
                            09104      10121      10301      11102      12102
                           mg/L F      MEQ/L   pH UNITS    mg/L Na    mg/L Mg


 NO. OF L-FLAGGED VALUES        8          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          9         52          9          9
 MEAN                         0.1      38.11        7.8         7.         2.
 MINIMUM                      0.1      29.00        7.5         3.         1.
 DATE OF MINIMUM       1994-03-24 1995-07-12 1995-04-12 1994-08-10 1994-08-10
 10TH PERCENTILE                                    7.6                      
 MEDIAN                       0.1      39.00        7.9         4.         2.
 90TH PERCENTILE                                    8.0                      
 MAXIMUM                      0.2      47.00        8.2        13.         3.
 DATE OF MAXIMUM       1995-10-20 1994-03-24 1995-04-12 1996-03-29 1996-03-29
 STANDARD DEVIATION           0.0       7.18        0.2         4.         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        2          0          4          5          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          9          5          4          9
 MEAN                       0.082       6.77      0.039      0.014        14.
 MINIMUM                    0.010       3.60      0.010      0.010         9.
 DATE OF MINIMUM       1994-03-24 1995-10-20 1994-03-24 1994-03-24 1994-08-10
 10TH PERCENTILE                                                             
 MEDIAN                     0.040       7.40      0.020      0.010        13.
 90TH PERCENTILE                                                             
 MAXIMUM                    0.290       9.30      0.120      0.030        19.
 DATE OF MAXIMUM       1995-07-12 1996-03-29 1994-08-10 1994-08-10 1996-03-29
 STANDARD DEVIATION         0.092       2.17      0.044      0.007         4.




                               Cl          K         Ca         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      25104      26004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        9          9          9          9          9
 MEAN                         11.        1.0     17.444       0.01       0.06
 MINIMUM                       3.        0.5     11.000       0.00       0.01
 DATE OF MINIMUM       1994-08-10 1995-10-20 1995-10-20 1994-03-24 1995-10-20
 10TH PERCENTILE                                                             
 MEDIAN                        4.        0.9     14.000       0.01       0.03
 90TH PERCENTILE                                                             
 MAXIMUM                      25.        1.5     25.000       0.01       0.16
 DATE OF MAXIMUM       1996-03-29 1996-03-29 1996-03-29 1995-09-08 1995-07-12
 STANDARD DEVIATION            9.        0.4      5.480       0.01       0.05




                               Ni         Se   FAEC COL       INST
                             DISS       DISS                DISCHG
                            28102      34102      36012      97160
                          mg/L Ni    mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        9          9          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0          7          9
 MEAN                       0.001      0.001        11.      140.6
 MINIMUM                    0.001      0.001         1.       14.8
 DATE OF MINIMUM       1994-03-24 1994-03-24 1994-03-24 1994-03-24
 10TH PERCENTILE                                                  
 MEDIAN                     0.001      0.001         6.       65.4
 90TH PERCENTILE                                                  
 MAXIMUM                    0.001      0.002        35.      297.4
 DATE OF MAXIMUM       1996-03-29 1995-09-08 1994-07-14 1995-07-12
 STANDARD DEVIATION         0.000      0.000        13.      128.6





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-03-23 TO 1994-06-29

 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          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          2          2          2          2
 MEAN                        327.       12.0       0.60       0.28       11.8
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                                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        1          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          2          2          1          1
 MEAN                         0.1      76.00        8.1        15.         5.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               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        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          1          2          1          1
 MEAN                       0.020       5.50      0.045      0.015        16.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          



                               Cl          K         Ca         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      25104      26004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          1          1          1          1
 MEAN                         27.        1.3     30.000       0.03       0.06
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               Ni         Se   FAEC COL
                             DISS       DISS           
                            28102      34102      36012
                          mg/L Ni    mg/L Se   No/100ml


 NO. OF L-FLAGGED VALUES        1          1          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        0          0          2
 MEAN                       0.001      0.001       389.
 MINIMUM                                               
 DATE OF MINIMUM                                       
 10TH PERCENTILE                                       
 MEDIAN                                                
 90TH PERCENTILE                                       
 MAXIMUM                                               
 DATE OF MAXIMUM                                       
 STANDARD DEVIATION                                    





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-05-04 TO 1994-06-15

 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       18         18          2          2         18
 MEAN                        270.       11.2       0.60       0.09       12.0
 MINIMUM                     254.        5.1                              9.4
 DATE OF MINIMUM       1994-06-15 1994-05-04                       1994-06-15
 10TH PERCENTILE             260.        5.1                              9.5
 MEDIAN                      270.       11.2                             11.8
 90TH PERCENTILE             275.       17.4                             14.6
 MAXIMUM                     291.       17.4                             14.7
 DATE OF MAXIMUM       1994-06-15 1994-06-15                       1994-05-04
 STANDARD DEVIATION            8.        6.3                              2.4




                                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          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2         18          2          2          0
 MEAN                         0.1        8.0         9.         8.      0.010
 MINIMUM                                 7.9                                 
 DATE OF MINIMUM                  1994-05-04                                 
 10TH PERCENTILE                         8.0                                 
 MEDIAN                                  8.0                                 
 90TH PERCENTILE                         8.0                                 
 MAXIMUM                                 8.0                                 
 DATE OF MAXIMUM                  1994-06-15                                 
 STANDARD DEVIATION                      0.0                                 




                               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          2          2          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          0          0          2          2
 MEAN                        0.19      0.010      0.010        22.        16.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                                K         Ca         Mn         Fe         Ni
                             DISS       DISS       DISS      TOTAL       DISS
                            19102      20103      25104      26004      28102
                           mg/L K    mg/L Ca    mg/L Mn    mg/L Fe    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          2          2          2          2
 MEAN                         1.5     30.000       0.00       0.00      0.002
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               Se   FAEC COL
                             DISS           
                            34102      36012
                          mg/L Se   No/100ml


 NO. OF L-FLAGGED VALUES        2          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        0          2
 MEAN                       0.001        17.
 MINIMUM                                    
 DATE OF MINIMUM                            
 10TH PERCENTILE                            
 MEDIAN                                     
 90TH PERCENTILE                            
 MAXIMUM                                    
 DATE OF MAXIMUM                            
 STANDARD DEVIATION                         





 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  - 1994-01-01 TO 1996-12-31
 PERIOD OF RECORD FROM  - 1994-05-16 TO 1994-06-20

 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        2          2          2          2          2
 MEAN                        270.       12.2       0.30       0.03        8.8
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                                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        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          2          2          2          2
 MEAN                         0.1      92.00        7.9        10.         8.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               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          1          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          2          1          1          2
 MEAN                       0.015       0.30      0.010      0.010        24.
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               Cl          K         Ca         Mn         Fe
                             DISS       DISS       DISS       DISS      TOTAL
                            17203      19102      20103      25104      26004
                          mg/L Cl     mg/L K    mg/L Ca    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        2          2          2          2          2
 MEAN                         20.        1.5     34.500       0.00       0.01
 MINIMUM                                                                     
 DATE OF MINIMUM                                                             
 10TH PERCENTILE                                                             
 MEDIAN                                                                      
 90TH PERCENTILE                                                             
 MAXIMUM                                                                     
 DATE OF MAXIMUM                                                             
 STANDARD DEVIATION                                                          




                               Ni         Se   FAEC COL       INST
                             DISS       DISS                DISCHG
                            28102      34102      36012      97160
                          mg/L Ni    mg/L Se   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        1          2          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        1          0          2          2
 MEAN                       0.001      0.001         2.     4469.0
 MINIMUM                                                          
 DATE OF MINIMUM                                                  
 10TH PERCENTILE                                                  
 MEDIAN                                                           
 90TH PERCENTILE                                                  
 MAXIMUM                                                          
 DATE OF MAXIMUM                                                  
 STANDARD DEVIATION                                               




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Last updated: 2001-07-30