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STATISTICS for THE UNITED KINGDOM

STATISTICS FOR THE UNITED KINGDOM


GEMS/WATER - STATISTICAL SUMMARY BY STATION     2002-02-18   PAGE 691

 STATION - RIVER THAMES                             STATION NO. 027001
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       3.0
 LOCATION - OCT. 0  LAT. 51/25/44  LONG. 000/19/02  ELEVATION(M)   4.7
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-02 TO 1987-12-17

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP       TEMP          B    PHENOLS
                             COND                             DISS           
                            02041      02061      02062      05102      06532
                            us/cm      deg C      deg C     mg/L B       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       73         54         23         71          1
 MEAN                        668.       11.2       11.8        0.2      0.011
 MINIMUM                     537.        0.0        1.5        0.1           
 DATE OF MINIMUM       1985-04-09 1985-01-15 1987-01-21 1987-10-20           
 10TH PERCENTILE             585.        3.5        4.3        0.1           
 MEDIAN                      664.       11.0       13.0        0.2           
 90TH PERCENTILE             746.       18.2       19.0        0.4           
 MAXIMUM                     805.       20.0       21.0        0.5           
 DATE OF MAXIMUM       1987-09-09 1986-07-21 1987-07-15 1986-07-21           
 STANDARD DEVIATION           65.        5.7        5.8        0.1           




                               CN   CHLORO A     NO3NO2        NH3        NH3
                                                                             
                            06606      06711      07105      07555      07556
                          mg/L Cn       mg/L     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        1          0          0          6          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0         23         74         52         21
 MEAN                       0.010    43.0583       7.06       0.29       0.35
 MINIMUM                              1.0000       4.80       0.04       0.05
 DATE OF MINIMUM                  1985-01-15 1986-07-10 1986-04-22 1987-04-28
 10TH PERCENTILE                      3.1800       5.59       0.05       0.05
 MEDIAN                              18.7500       7.00       0.23       0.25
 90TH PERCENTILE                     96.5500       8.37       0.55       0.72
 MAXIMUM                            265.0000      10.80       1.30       1.10
 DATE OF MAXIMUM                  1987-05-21 1985-12-12 1986-03-05 1987-10-07
 STANDARD DEVIATION                  66.4868       1.12       0.23       0.27




                          PERCENT         O2         O2        BOD        COD
                           DO SAT       DISS       DISS                      
                            08001      08101      08102      08201      08301
                          PERCENT    mg/L O2    mg/L O2    mg/L O2    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       22         45          9         24          2
 MEAN                         91.       10.3        9.8         3.        24.
 MINIMUM                      63.        6.4        6.4         1.           
 DATE OF MINIMUM       1987-01-21 1985-07-02 1987-07-15 1987-04-02           
 10TH PERCENTILE              71.        8.0                    1.           
 MEDIAN                       94.       10.1        9.1         2.           
 90TH PERCENTILE             106.       12.6                    4.           
 MAXIMUM                     136.       13.2       14.3         8.           
 DATE OF MAXIMUM       1987-05-21 1986-05-13 1987-05-21 1987-05-13           
 STANDARD DEVIATION           15.        1.8        2.3         2.           




                                F        ALK         pH         pH   SUSP SOL
                             DISS      TOTAL                          105 DEG
                            09105      10102      10301      10302      10401
                           mg/L F       mg/L   pH UNITS   pH UNITS       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       20         73         23         59         74
 MEAN                         0.3      57.70        7.8        8.0        23.
 MINIMUM                      0.2       2.20        7.3        7.5         2.
 DATE OF MINIMUM       1985-06-05 1986-11-19 1987-10-07 1985-07-30 1985-10-15
 10TH PERCENTILE              0.2       3.43        7.5        7.7         6.
 MEDIAN                       0.2       4.00        7.7        7.9        17.
 90TH PERCENTILE              0.3     207.70        8.2        8.4        38.
 MAXIMUM                      0.3     223.00        8.8        8.9       145.
 DATE OF MAXIMUM       1985-01-31 1987-05-13 1987-05-13 1985-05-09 1985-01-22
 STANDARD DEVIATION           0.0      88.60        0.4        0.3        23.




                               Na         Mg         Si      PO4-P   SULPHATE
                             DISS       DISS   REACTIVE        SOL           
                            11105      12102      14101      15254      16301
                          mg/L Na    mg/L Mg   mg/LSiO2   mg/L PO4   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       13         13         20         82         34
 MEAN                         29.         6.       9.73      1.321        60.
 MINIMUM                      25.         4.       0.20      0.430        16.
 DATE OF MINIMUM       1985-04-09 1986-07-10 1985-05-09 1985-02-11 1985-12-12
 10TH PERCENTILE              25.         5.       4.60      0.646        45.
 MEDIAN                       28.         6.      10.35      1.090        62.
 90TH PERCENTILE              33.         6.      12.60      2.400        71.
 MAXIMUM                      36.         8.      13.40      2.700        72.
 DATE OF MAXIMUM       1986-07-10 1985-03-14 1985-01-15 1987-10-07 1986-11-06
 STANDARD DEVIATION            3.         1.       3.19      0.628        11.




                         SULPHATE         Cl    P,P-DDT    P,P-DDE     ALDRIN
                                        DISS                                 
                            16304      17203      18000      18020      18130
                         mg/L SO4    mg/L Cl       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES        0          0         68         67          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       21         82          0          1          0
 MEAN                         63.        43.     48.029     19.309      5.500
 MINIMUM                      55.        27.      1.000      3.000      1.000
 DATE OF MINIMUM       1987-09-09 1986-11-19 1986-09-11 1986-09-11 1986-04-17
 10TH PERCENTILE              56.        36.     50.000     20.000           
 MEDIAN                       63.        43.     50.000     20.000      5.500
 90TH PERCENTILE              69.        52.     50.000     20.000           
 MAXIMUM                      75.        62.     50.000     20.000     10.000
 DATE OF MAXIMUM       1987-05-13 1985-01-22 1986-08-28 1986-08-28 1986-12-18
 STANDARD DEVIATION            5.         7.      9.274      3.247      5.196




                         DIELDRIN          K         Cr         Mn         Fe
                                        DISS      TOTAL      TOTAL      TOTAL
                            18150      19105      24002      25004      26002
                             ug/L     mg/L K    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES       62          0         62          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         13          4          7          1
 MEAN                       5.348        5.8      0.010       0.05       0.21
 MINIMUM                    1.000        4.7      0.001       0.02           
 DATE OF MINIMUM       1986-09-11 1985-03-26 1986-05-20 1985-01-07           
 10TH PERCENTILE            5.000        4.8      0.010                      
 MEDIAN                     5.000        5.6      0.010       0.03           
 90TH PERCENTILE            5.000        7.1      0.010                      
 MAXIMUM                   23.000        7.4      0.010       0.15           
 DATE OF MAXIMUM       1985-01-15 1986-07-10 1986-03-17 1985-01-22           
 STANDARD DEVIATION         2.484        0.9      0.002       0.05           




                               Ni         Cu         Cu         Zn         As
                            TOTAL      TOTAL       DISS      TOTAL      TOTAL
                            28001      29006      29106      30004      33007
                          mg/L Ni    mg/L Cu    mg/L Cu    mg/L Zn    mg/L As


 NO. OF L-FLAGGED VALUES       59         57         17         13          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         10          3         55          2
 MEAN                       0.011      0.011      0.010      0.021      0.005
 MINIMUM                    0.006      0.005      0.010      0.009      0.005
 DATE OF MINIMUM       1986-09-11 1986-04-17 1987-01-21 1986-05-20 1987-10-20
 10TH PERCENTILE            0.010      0.010      0.010      0.010           
 MEDIAN                     0.010      0.010      0.010      0.020      0.005
 90TH PERCENTILE            0.010      0.010      0.010      0.032           
 MAXIMUM                    0.040      0.040      0.010      0.080      0.005
 DATE OF MAXIMUM       1987-05-13 1986-02-20 1987-12-17 1985-01-22 1987-12-17
 STANDARD DEVIATION         0.004      0.005      0.000      0.013      0.000




                               Cd         Cd         Ba         Pb
                            TOTAL       DISS      TOTAL      TOTAL
                            48001      48101      80011      82001
                          mg/L Cd    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES       55          4         36         54
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES       10          0          3         11
 MEAN                       0.597      0.001      0.332      0.008
 MINIMUM                    0.100      0.001      0.010      0.001
 DATE OF MINIMUM       1986-09-11 1987-03-23 1986-05-13 1986-09-11
 10TH PERCENTILE            0.500                 0.019      0.005
 MEDIAN                     0.500      0.001      0.500      0.005
 90TH PERCENTILE            1.000                 0.500      0.010
 MAXIMUM                    1.300      0.001      0.500      0.040
 DATE OF MAXIMUM       1986-05-12 1987-12-02 1985-08-20 1985-01-22
 STANDARD DEVIATION         0.224      0.000      0.201      0.007





 STATION - RIVER AVON                               STATION NO. 027002
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       4.5
 LOCATION - OCT. 0  LAT. 51/25/07  LONG. 002/29/11  ELEVATION(M)  15.5
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-08 TO 1987-12-04

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             TEMP     NO3NO2      NO2-N        NH3    PERCENT
                                                                       DO SAT
                            02061      07105      07207      07555      08001
                            deg C     mg/L N     mg/L N     mg/L N    PERCENT


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       30         44         44         43         12
 MEAN                        11.8       7.99       0.10       0.34        87.
 MINIMUM                      3.0       5.10       0.04       0.10        72.
 DATE OF MINIMUM       1987-01-30 1986-08-29 1986-08-29 1987-04-24 1987-07-17
 10TH PERCENTILE              6.0       5.66       0.07       0.14        73.
 MEDIAN                      12.0       7.90       0.09       0.28        88.
 90TH PERCENTILE             17.0       9.76       0.14       0.60        95.
 MAXIMUM                     19.0      10.87       0.20       0.77        99.
 DATE OF MAXIMUM       1987-08-21 1985-01-08 1985-06-11 1985-11-27 1987-04-24
 STANDARD DEVIATION           4.6       1.46       0.03       0.18         9.




                               O2        BOD         pH   SUSP SOL         Na
                             DISS                          105 DEG       DISS
                            08101      08201      10302      10401      11103
                          mg/L O2    mg/L O2   pH UNITS       mg/L    mg/L Na


 NO. OF L-FLAGGED VALUES        0          0          0          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       29         12         42         42         34
 MEAN                         9.2        18.        8.0        17.        25.
 MINIMUM                      5.9         2.        7.4         2.        15.
 DATE OF MINIMUM       1985-09-23 1987-01-30 1985-01-23 1985-02-19 1987-01-05
 10TH PERCENTILE              6.9         2.        7.5         6.        16.
 MEDIAN                       9.3         3.        8.0        11.        22.
 90TH PERCENTILE             11.3         4.        8.3        27.        37.
 MAXIMUM                     12.7       181.        8.4        85.        45.
 DATE OF MAXIMUM       1987-01-30 1987-12-04 1986-05-12 1985-01-23 1987-09-08
 STANDARD DEVIATION           1.7        51.        0.3        17.         8.




                               Mg         Si      PO4-P   SULPHATE         Cl
                             DISS   REACTIVE        SOL                  DISS
                            12103      14101      15254      16302      17203
                          mg/L Mg   mg/LSiO2   mg/L PO4   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       37         44         43          9         44
 MEAN                          7.       3.54      0.822        74.        38.
 MINIMUM                       5.       1.07      0.090        53.        25.
 DATE OF MINIMUM       1985-01-23 1986-05-12 1985-09-12 1987-01-05 1987-01-05
 10TH PERCENTILE               6.       1.91      0.350                   30.
 MEDIAN                        7.       3.70      0.650        68.        34.
 90TH PERCENTILE               8.       4.36      1.604                   51.
 MAXIMUM                      10.       5.20      2.200       100.        65.
 DATE OF MAXIMUM       1986-08-29 1985-07-31 1986-10-09 1987-05-22 1986-10-09
 STANDARD DEVIATION            1.       0.90      0.501        17.         9.




                                K         Ca         Cr         Ni         Cu
                             DISS       DISS      TOTAL      TOTAL      TOTAL
                            19103      20101      24002      28001      29006
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Ni    mg/L Cu


 NO. OF L-FLAGGED VALUES        0          0          5          6          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       34         39         22         23         32
 MEAN                         6.4    119.615      0.002      0.004      0.005
 MINIMUM                      4.0     92.000      0.001      0.002      0.001
 DATE OF MINIMUM       1986-02-11 1985-01-23 1985-01-08 1985-01-08 1985-07-31
 10TH PERCENTILE              4.3    108.000      0.001      0.002      0.002
 MEDIAN                       6.1    120.200      0.001      0.003      0.004
 90TH PERCENTILE              9.0    129.600      0.002      0.004      0.008
 MAXIMUM                      9.5    135.000      0.005      0.040      0.021
 DATE OF MAXIMUM       1986-08-29 1985-01-08 1986-11-07 1985-11-27 1985-11-27
 STANDARD DEVIATION           1.7      8.651      0.001      0.007      0.004




                               Cd         Pb       INST
                            TOTAL      TOTAL     DISCHG
                            48001      82001      97160
                          mg/L Cd    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES        9          4          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES       21         23         40
 MEAN                       0.213      0.005       16.9
 MINIMUM                    0.100      0.002        4.1
 DATE OF MINIMUM       1985-01-08 1985-01-08 1986-10-09
 10TH PERCENTILE            0.100      0.002        6.6
 MEDIAN                     0.100      0.004       14.1
 90TH PERCENTILE            0.400      0.009       28.8
 MAXIMUM                    1.100      0.010       47.3
 DATE OF MAXIMUM       1985-11-27 1987-08-21 1985-01-23
 STANDARD DEVIATION         0.234      0.002       10.5





 STATION - RIVER EXE                                STATION NO. 027003
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       1.5
 LOCATION - OCT. 0  LAT. 50/48/13  LONG. 003/30/36  ELEVATION(M)  25.9
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-02-04 TO 1987-12-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP        TOC   CHLORO A     NO3NO2
                             COND                                            
                            02041      02061      06001      06711      07105
                            us/cm      deg C     mg/L C       mg/L     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       45         45         40         34         45
 MEAN                        173.        9.9         7.     6.1257       2.65
 MINIMUM                     126.        2.3         3.     1.0000       1.60
 DATE OF MINIMUM       1986-11-27 1985-02-12 1987-03-30 1987-01-19 1985-11-12
 10TH PERCENTILE             136.        4.5         4.     1.5000       2.05
 MEDIAN                      164.        9.0         7.     4.0000       2.70
 90TH PERCENTILE             214.       16.5         9.    10.0000       3.20
 MAXIMUM                     244.       19.0        12.    53.0000       3.50
 DATE OF MAXIMUM       1986-07-22 1985-07-04 1987-12-16 1987-10-21 1986-01-30
 STANDARD DEVIATION           32.        4.7         2.     9.0510       0.45




                              NH3    PERCENT         O2        BOD        ALK
                                      DO SAT       DISS                 TOTAL
                            07556      08001      08101      08201      10101
                           mg/L N    PERCENT    mg/L O2    mg/L O2       mg/L


 NO. OF L-FLAGGED VALUES        1          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       44         16         45         16         45
 MEAN                        0.07       100.       11.6         2.       0.79
 MINIMUM                     0.01        86.        8.6         1.       0.50
 DATE OF MINIMUM       1986-09-29 1987-07-16 1986-07-21 1987-08-04 1986-10-24
 10TH PERCENTILE             0.02        90.        9.3         1.       0.55
 MEDIAN                      0.05        98.       12.0         2.       0.70
 90TH PERCENTILE             0.13       109.       13.1         3.       1.10
 MAXIMUM                     0.32       117.       14.0         4.       1.50
 DATE OF MAXIMUM       1986-04-08 1987-05-18 1987-01-19 1987-12-16 1985-03-12
 STANDARD DEVIATION          0.07         8.        1.4         1.       0.23




                              ALK         pH   SUSP SOL         Na         Mg
                            TOTAL               105 DEG       DISS       DISS
                            10102      10302      10401      11103      12102
                             mg/L   pH UNITS       mg/L    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       16         45         45         44         44
 MEAN                       39.50        7.7         9.        10.         4.
 MINIMUM                    25.00        6.9         2.         6.         3.
 DATE OF MINIMUM       1987-03-24 1985-11-12 1985-03-18 1986-11-27 1986-11-27
 10TH PERCENTILE            27.40        7.4         3.         7.         3.
 MEDIAN                     38.00        7.6         6.        10.         4.
 90TH PERCENTILE            52.00        8.0        16.        13.         5.
 MAXIMUM                    56.00        8.7        35.        20.         5.
 DATE OF MAXIMUM       1987-05-12 1985-06-19 1986-04-08 1986-07-22 1986-07-22
 STANDARD DEVIATION          9.28        0.3         8.         3.         1.




                               Si      PO4-P   SULPHATE         Cl    P,P-DDT
                         REACTIVE        SOL                  DISS           
                            14101      15254      16306      17202      18000
                         mg/LSiO2   mg/L PO4   mg/L SO4    mg/L Cl       ug/L


 NO. OF L-FLAGGED VALUES        0          1          0          0         41
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       45         44         16         45          0
 MEAN                        4.05      0.098        14.        16.      5.000
 MINIMUM                     1.00      0.010         9.        12.      5.000
 DATE OF MINIMUM       1985-05-15 1986-10-24 1987-03-24 1986-05-27 1985-02-25
 10TH PERCENTILE             3.00      0.040        10.        12.      5.000
 MEDIAN                      4.10      0.080        14.        16.      5.000
 90TH PERCENTILE             5.00      0.180        17.        20.      5.000
 MAXIMUM                     6.70      0.250        18.        23.      5.000
 DATE OF MAXIMUM       1987-11-03 1986-07-22 1987-05-18 1987-02-03 1987-12-16
 STANDARD DEVIATION          0.99      0.057         3.         3.      0.000




                              DDT    P,P-DDE    LINDANE     ALDRIN   DIELDRIN
                            TOTAL                                            
                            18002      18020      18070      18130      18150
                             ug/L       ug/L       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES       15         41          1         41         39
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          0         14          0          0
 MEAN                       0.005      3.000      0.006      1.000      3.146
 MINIMUM                    0.005      3.000      0.001      1.000      3.000
 DATE OF MINIMUM       1987-01-19 1985-02-25 1987-01-19 1985-02-25 1985-02-25
 10TH PERCENTILE            0.005      3.000      0.001      1.000      3.000
 MEDIAN                     0.005      3.000      0.004      1.000      3.000
 90TH PERCENTILE            0.005      3.000      0.012      1.000      3.000
 MAXIMUM                    0.005      3.000      0.026      1.000      6.000
 DATE OF MAXIMUM       1987-12-16 1987-12-16 1987-07-16 1987-12-16 1987-11-18
 STANDARD DEVIATION         0.000      0.000      0.006      0.000      0.654




                              BHC          K         Ca         Cr         Mn
                                        DISS       DISS      TOTAL      TOTAL
                            18814      19103      20103      24002      25004
                             ug/L     mg/L K    mg/L Ca    mg/L Cr    mg/L Mn


 NO. OF L-FLAGGED VALUES        3          0          0         44          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       36         44         44          0         44
 MEAN                       6.341        2.0     16.275      0.005       0.04
 MINIMUM                    1.000        1.3     11.200      0.005       0.01
 DATE OF MINIMUM       1985-04-23 1985-07-04 1987-06-08 1985-02-04 1987-05-18
 10TH PERCENTILE            1.000        1.4     12.420      0.005       0.02
 MEDIAN                     4.000        1.9     16.100      0.005       0.03
 90TH PERCENTILE           11.800        2.7     20.500      0.005       0.05
 MAXIMUM                   26.000        3.4     22.300      0.005       0.10
 DATE OF MAXIMUM       1987-07-16 1987-12-16 1985-03-12 1987-12-16 1985-07-22
 STANDARD DEVIATION         5.910        0.5      3.020      0.000       0.02





                               Fe         Ni         Cu         Zn   FAEC COL
                            TOTAL      TOTAL      TOTAL      TOTAL           
                            26004      28001      29006      30004      36012
                          mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn   No/100ml


 NO. OF L-FLAGGED VALUES        0         43         43         13          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       44          1          1         31          4
 MEAN                        0.29      0.005      0.005      0.009       575.
 MINIMUM                     0.08      0.005      0.005      0.005       400.
 DATE OF MINIMUM       1987-05-18 1985-02-04 1985-02-04 1986-05-19 1985-02-25
 10TH PERCENTILE             0.13      0.005      0.005      0.005           
 MEDIAN                      0.22      0.005      0.005      0.007       550.
 90TH PERCENTILE             0.50      0.005      0.005      0.013           
 MAXIMUM                     0.85      0.005      0.005      0.066       800.
 DATE OF MAXIMUM       1987-03-24 1987-12-16 1987-12-16 1987-01-19 1985-02-12
 STANDARD DEVIATION          0.19      0.000      0.000      0.009       206.




                             FAEC         Cd         Ba         Pb
                            STREP      TOTAL      TOTAL      TOTAL
                            36102      48001      80016      82001
                         No/100ml    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        0         41          9         42
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES        4          2          1          1
 MEAN                         88.      0.759      0.100      0.008
 MINIMUM                      20.      0.700      0.100      0.005
 DATE OF MINIMUM       1985-03-12 1985-02-12 1987-01-19 1985-02-25
 10TH PERCENTILE                       0.700      0.100      0.008
 MEDIAN                       90.      0.700      0.100      0.008
 90TH PERCENTILE                       0.700      0.100      0.008
 MAXIMUM                     150.      2.400      0.100      0.009
 DATE OF MAXIMUM       1985-03-18 1985-02-04 1987-11-18 1986-07-22
 STANDARD DEVIATION           65.      0.272      0.000      0.000





 STATION - RIVER TRENT                              STATION NO. 027004
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       4.0
 LOCATION - OCT. 0  LAT. 52/56/19  LONG. 001/08/06  ELEVATION(M)  15.7
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-10 TO 1987-12-03

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP          B        TOC     NO3NO2
                             COND                  DISS                      
                            02041      02061      05102      06001      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       67         67         27         63         67
 MEAN                        858.       12.2        0.4         6.       8.69
 MINIMUM                     546.        2.5        0.0         2.       5.80
 DATE OF MINIMUM       1986-08-28 1985-12-30 1985-07-30 1985-07-30 1985-08-14
 10TH PERCENTILE             656.        5.8        0.1         5.       6.87
 MEDIAN                      855.       11.5        0.4         6.       8.60
 90TH PERCENTILE            1025.       18.6        0.7         8.      10.40
 MAXIMUM                    1197.       24.7        0.9        15.      11.80
 DATE OF MAXIMUM       1986-12-10 1987-07-07 1986-07-29 1987-08-24 1985-12-10
 STANDARD DEVIATION          149.        5.1        0.2         2.       1.41




                              NH3         O2        BOD          F        ALK
                                        DISS                  DISS      TOTAL
                            07556      08102      08201      09105      10102
                           mg/L N    mg/L O2    mg/L O2     mg/L F       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       67         65         22         28         64
 MEAN                        0.39       10.0         3.        0.3      52.76
 MINIMUM                     0.00        7.6         2.        0.0       1.20
 DATE OF MINIMUM       1985-07-03 1987-08-24 1987-10-02 1985-06-11 1985-07-30
 10TH PERCENTILE             0.04        8.4         2.        0.2       2.65
 MEDIAN                      0.37       10.2         3.        0.3       3.40
 90TH PERCENTILE             0.79       11.5         4.        0.4     164.00
 MAXIMUM                     1.36       13.3         8.        0.7     186.00
 DATE OF MAXIMUM       1986-02-26 1985-12-30 1987-08-24 1986-07-29 1987-02-23
 STANDARD DEVIATION          0.31        1.2         1.        0.1      73.07




                               pH         pH   SUSP SOL         Na         Mg
                                                105 DEG       DISS       DISS
                            10301      10302      10401      11103      12102
                         pH UNITS   pH UNITS       mg/L    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       22         45         67         21         19
 MEAN                         8.0        7.8        22.        64.        19.
 MINIMUM                      7.7        6.8         4.        30.         5.
 DATE OF MINIMUM       1987-08-24 1986-12-10 1987-08-05 1987-10-22 1985-07-30
 10TH PERCENTILE              7.8        7.6         8.        34.        13.
 MEDIAN                       7.9        7.9        14.        59.        20.
 90TH PERCENTILE              8.3        8.0        36.        95.        25.
 MAXIMUM                      8.4        8.3       153.       102.        27.
 DATE OF MAXIMUM       1987-08-05 1986-05-29 1987-08-24 1985-10-23 1985-03-21
 STANDARD DEVIATION           0.2        0.2        24.        22.         5.




                               Si      PO4-P   SULPHATE         Cl          K
                         REACTIVE        SOL                  DISS       DISS
                            14101      15254      16302      17203      19102
                         mg/LSiO2   mg/L PO4   mg/L SO4    mg/L Cl     mg/L K


 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         67         29         67          9
 MEAN                        8.41      1.559       149.        92.        9.0
 MINIMUM                     4.40      0.060        23.        48.        5.9
 DATE OF MINIMUM       1985-10-31 1986-11-04 1985-07-30 1986-08-28 1987-04-01
 10TH PERCENTILE             5.40      0.791       115.        56.           
 MEDIAN                      8.59      1.400       144.        92.        8.6
 90TH PERCENTILE            10.03      2.593       197.       122.           
 MAXIMUM                    11.20      3.200       211.       147.       12.4
 DATE OF MAXIMUM       1986-02-19 1986-10-10 1986-10-10 1986-10-10 1987-07-22
 STANDARD DEVIATION          1.76      0.694        39.        25.        2.0




                                K         Ca         Cr         Cr         Ni
                             DISS       DISS      TOTAL       DISS      TOTAL
                            19103      20103      24002      24052      28001
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Cr    mg/L Ni


 NO. OF L-FLAGGED VALUES        0          0          2          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         20         65         61         56
 MEAN                         9.0     94.425      0.007      0.005      0.026
 MINIMUM                      6.7     56.000      0.002      0.001      0.010
 DATE OF MINIMUM       1986-01-28 1987-08-24 1987-01-07 1985-12-10 1985-05-31
 10TH PERCENTILE              6.7     74.000      0.003      0.001      0.015
 MEDIAN                       8.6     95.600      0.006      0.003      0.025
 90TH PERCENTILE             11.6    110.000      0.010      0.010      0.035
 MAXIMUM                     12.2    115.000      0.030      0.023      0.060
 DATE OF MAXIMUM       1985-10-23 1985-02-18 1986-01-28 1986-01-28 1987-08-24
 STANDARD DEVIATION           1.9     14.509      0.004      0.004      0.010




                               Ni         Cu         Cu         Zn         Zn
                             DISS      TOTAL       DISS      TOTAL       DISS
                            28101      29006      29106      30004      30104
                          mg/L Ni    mg/L Cu    mg/L Cu    mg/L Zn    mg/L Zn


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       66         67         67         40         66
 MEAN                       0.023      0.019      0.012      0.058      0.033
 MINIMUM                    0.008      0.002      0.001      0.020      0.010
 DATE OF MINIMUM       1986-11-21 1986-01-28 1987-05-11 1987-03-17 1985-04-25
 10TH PERCENTILE            0.011      0.010      0.006      0.030      0.020
 MEDIAN                     0.022      0.019      0.010      0.050      0.030
 90TH PERCENTILE            0.034      0.030      0.020      0.080      0.042
 MAXIMUM                    0.049      0.080      0.020      0.160      0.110
 DATE OF MAXIMUM       1986-10-10 1987-11-24 1985-02-18 1986-11-21 1987-04-06
 STANDARD DEVIATION         0.009      0.010      0.005      0.026      0.015




                               As         Cd         Cd         Ba         Pb
                            TOTAL      TOTAL       DISS      TOTAL      TOTAL
                            33003      48001      48101      80016      82001
                          mg/L As    mg/L Cd    mg/L Cd    ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        0          1          1          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        8         63         66         19         67
 MEAN                       0.005      0.416      0.270      0.077      0.011
 MINIMUM                    0.002      0.050      0.040      0.050      0.002
 DATE OF MINIMUM       1985-07-30 1985-06-11 1987-07-07 1985-06-11 1986-07-24
 10TH PERCENTILE                       0.080      0.050      0.050      0.004
 MEDIAN                     0.005      0.400      0.200      0.050      0.008
 90TH PERCENTILE                       0.700      0.500      0.100      0.018
 MAXIMUM                    0.007      1.600      1.000      0.280      0.056
 DATE OF MAXIMUM       1985-02-18 1987-08-24 1987-10-22 1985-08-14 1987-08-24
 STANDARD DEVIATION         0.001      0.286      0.207      0.054      0.009




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


 NO. OF L-FLAGGED VALUES        0          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES       67         67
 MEAN                       0.002       88.6
 MINIMUM                    0.001       31.9
 DATE OF MINIMUM       1985-01-10 1986-10-10
 10TH PERCENTILE            0.001       36.6
 MEDIAN                     0.002       60.1
 90TH PERCENTILE            0.004      193.0
 MAXIMUM                    0.011      264.9
 DATE OF MAXIMUM       1986-04-04 1986-02-04
 STANDARD DEVIATION         0.002       62.1





 STATION - RIVER DEE                                STATION NO. 027005
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       3.0
 LOCATION - OCT. 0  LAT. 53/08/04  LONG. 002/52/12  ELEVATION(M)   4.0
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-07 TO 1987-11-09

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP   CHLORO A     NO3NO2      NO2-N
                             COND                                            
                            02041      02061      06711      07105      07207
                            us/cm      deg C       mg/L     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0         11          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       57         54         25         53         53
 MEAN                        293.        9.1     3.7028       1.68       0.05
 MINIMUM                     108.        0.7     1.0000       0.12       0.01
 DATE OF MINIMUM       1985-08-16 1986-02-27 1985-09-11 1987-09-30 1985-08-16
 10TH PERCENTILE             203.        2.5     1.0000       0.27       0.02
 MEDIAN                      291.        8.7     2.1500       1.68       0.04
 90TH PERCENTILE             373.       15.8     7.7400       2.78       0.09
 MAXIMUM                     532.       19.2    23.6000       4.20       0.29
 DATE OF MAXIMUM       1987-05-07 1987-07-07 1986-03-25 1985-02-28 1985-02-28
 STANDARD DEVIATION           78.        5.4     4.3795       0.95       0.05




                              NH3         O2        BOD        ALK         pH
                                        DISS                 TOTAL           
                            07556      08101      08201      10101      10301
                           mg/L N    mg/L O2    mg/L O2       mg/L   pH UNITS


 NO. OF L-FLAGGED VALUES        2          0          1          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       55         51         22          5         23
 MEAN                        0.24       10.5         2.       1.14        7.5
 MINIMUM                     0.02        7.0         1.       0.40        7.2
 DATE OF MINIMUM       1985-05-04 1987-07-07 1987-01-05 1985-08-16 1987-04-08
 10TH PERCENTILE             0.05        8.1         1.                   7.2
 MEDIAN                      0.16       10.7         2.       1.10        7.5
 90TH PERCENTILE             0.47       12.8         3.                   7.7
 MAXIMUM                     1.78       13.8         5.       1.70        8.6
 DATE OF MAXIMUM       1985-02-28 1985-01-07 1987-10-20 1985-02-15 1987-05-07
 STANDARD DEVIATION          0.27        1.7         1.       0.53        0.3




                               pH   SUSP SOL         Na         Na         Mg
                                     105 DEG       DISS       DISS      TOTAL
                            10302      10401      11102      11103      12002
                         pH UNITS       mg/L    mg/L Na    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       35         58         23         29         33
 MEAN                         7.7        16.        24.        21.         6.
 MINIMUM                      6.9         2.         7.        10.         2.
 DATE OF MINIMUM       1985-09-11 1987-05-18 1987-10-20 1985-08-16 1985-08-16
 10TH PERCENTILE              7.4         4.        11.        14.         4.
 MEDIAN                       7.6         9.        23.        20.         6.
 90TH PERCENTILE              7.9        40.        33.        32.         7.
 MAXIMUM                      8.1       122.        53.        39.        10.
 DATE OF MAXIMUM       1985-07-22 1987-04-08 1987-07-14 1986-10-15 1986-02-27
 STANDARD DEVIATION           0.2        20.        10.         7.         2.




                               Mg         Si      PO4-P   SULPHATE         Cl
                             DISS   REACTIVE        SOL                  DISS
                            12102      14101      15254      16304      17203
                          mg/L Mg   mg/LSiO2   mg/L PO4   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          0          1          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       22         45         54         41         56
 MEAN                          6.       2.44      0.242        34.        33.
 MINIMUM                       2.       0.73      0.050        10.        12.
 DATE OF MINIMUM       1987-10-20 1987-05-18 1987-01-05 1985-09-11 1987-10-20
 10TH PERCENTILE               3.       1.42      0.096        15.        21.
 MEDIAN                        5.       2.29      0.205        33.        31.
 90TH PERCENTILE               8.       3.25      0.376        51.        44.
 MAXIMUM                      26.       6.52      1.170        59.        88.
 DATE OF MAXIMUM       1987-07-14 1987-11-09 1987-07-14 1986-06-11 1985-02-28
 STANDARD DEVIATION            5.       1.15      0.165        13.        13.




                          P,P-DDT    P,P-DDE     ALDRIN   DIELDRIN        BHC
                                                                             
                            18000      18020      18130      18150      18814
                             ug/L       ug/L       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES        4          5          5          5          4
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          0          0          0          1
 MEAN                       6.600      3.000      2.600      3.000      3.400
 MINIMUM                    3.000      3.000      1.000      3.000      3.000
 DATE OF MINIMUM       1985-06-25 1985-06-25 1985-06-25 1985-06-25 1986-03-12
 10TH PERCENTILE                                                             
 MEDIAN                     3.000      3.000      3.000      3.000      3.000
 90TH PERCENTILE                                                             
 MAXIMUM                   21.000      3.000      3.000      3.000      5.000
 DATE OF MAXIMUM       1986-03-12 1986-11-06 1986-11-06 1986-11-06 1985-06-25
 STANDARD DEVIATION         8.050      0.000      0.894      0.000      0.894




                                K          K         Ca         Ca         Cr
                             DISS       DISS      TOTAL       DISS      TOTAL
                            19102      19103      20003      20103      24002
                           mg/L K     mg/L K    mg/L Ca    mg/L Ca    mg/L Cr


 NO. OF L-FLAGGED VALUES        0          0          0          0         51
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       23         28         33         22          1
 MEAN                         4.0        3.1     31.809     32.178      0.010
 MINIMUM                      1.5        1.3     10.600     13.100      0.010
 DATE OF MINIMUM       1987-01-05 1986-11-06 1985-08-16 1987-10-20 1985-01-07
 10TH PERCENTILE              1.9        2.1     19.180     15.600      0.010
 MEDIAN                       3.5        3.1     29.450     29.000      0.010
 90TH PERCENTILE              5.8        4.0     40.660     39.600      0.010
 MAXIMUM                      8.7        4.6     96.000    114.000      0.014
 DATE OF MAXIMUM       1987-07-14 1985-05-04 1986-05-16 1987-07-14 1987-02-19
 STANDARD DEVIATION           1.6        0.8     15.409     19.449      0.001




                               Mn         Fe         Ni         Cu         Zn
                            TOTAL      TOTAL      TOTAL      TOTAL      TOTAL
                            25004      26004      28001      29006      30004
                          mg/L Mn    mg/L Fe    mg/L Ni    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES        0          0         54         20          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       54         54          0         34         54
 MEAN                        0.08       0.35      0.010      0.007      0.025
 MINIMUM                     0.04       0.13      0.010      0.005      0.007
 DATE OF MINIMUM       1985-03-26 1986-11-06 1985-01-07 1985-01-07 1986-10-15
 10TH PERCENTILE             0.05       0.18      0.010      0.005      0.011
 MEDIAN                      0.07       0.28      0.010      0.005      0.021
 90TH PERCENTILE             0.12       0.75      0.010      0.011      0.041
 MAXIMUM                     0.18       1.04      0.010      0.016      0.075
 DATE OF MAXIMUM       1985-08-16 1987-04-08 1987-11-09 1987-02-19 1985-01-07
 STANDARD DEVIATION          0.03       0.22      0.000      0.003      0.015




                               Cd         Ba         Pb       INST
                            TOTAL      TOTAL      TOTAL     DISCHG
                            48001      80016      82001      97160
                          mg/L Cd    ug/L Hg    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES       33          1         37          0
 NO. OF G-FLAGGED VALUES        0          0          0          0
 NO. OF UNFLAGGED VALUES       20          0         14         20
 MEAN                       0.788      0.500      0.011       29.0
 MINIMUM                    0.001                 0.005       10.1
 DATE OF MINIMUM       1987-01-05            1985-03-13 1987-06-08
 10TH PERCENTILE            0.001                 0.005       11.2
 MEDIAN                     1.000                 0.010       23.0
 90TH PERCENTILE            2.000                 0.015       52.1
 MAXIMUM                    3.500                 0.038       83.1
 DATE OF MAXIMUM       1985-07-22            1986-01-19 1987-04-08
 STANDARD DEVIATION         0.821                 0.006       19.8





 STATION - RIVER LEVEN                              STATION NO. 027006
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       0.9
 LOCATION - OCT. 0  LAT. 55/58/14  LONG. 004/34/56  ELEVATION(M)   4.3
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-22 TO 1987-12-02

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2      NO2-N        NH3
                             COND                                            
                            02041      02061      07105      07207      07555
                            us/cm      deg C     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0         26         19
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       36         36         36          9         16
 MEAN                         74.        8.9       0.32       0.01       0.03
 MINIMUM                      62.        1.0       0.10       0.01       0.02
 DATE OF MINIMUM       1987-10-06 1985-01-22 1987-08-05 1985-01-22 1985-01-22
 10TH PERCENTILE              65.        2.0       0.20       0.01       0.02
 MEDIAN                       70.        9.5       0.31       0.01       0.02
 90TH PERCENTILE              84.       14.3       0.40       0.01       0.05
 MAXIMUM                     147.       17.0       0.50       0.01       0.10
 DATE OF MAXIMUM       1985-01-22 1986-07-16 1985-01-22 1987-12-02 1987-08-05
 STANDARD DEVIATION           15.        4.7       0.08       0.00       0.02




                              NH3    PERCENT         O2        BOD        ALK
                                      DO SAT       DISS                 TOTAL
                            07556      08001      08101      08201      10101
                           mg/L N    PERCENT    mg/L O2    mg/L O2       mg/L


 NO. OF L-FLAGGED VALUES        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        9         12         36         12         12
 MEAN                        0.03        94.       11.2         2.      12.58
 MINIMUM                     0.02        84.        9.2         1.       8.00
 DATE OF MINIMUM       1987-01-09 1987-01-09 1986-07-16 1987-10-06 1987-10-06
 10TH PERCENTILE             0.02        85.        9.6         1.       8.40
 MEDIAN                      0.02        94.       11.2         2.      12.50
 90TH PERCENTILE             0.04       103.       12.7         3.      15.70
 MAXIMUM                     0.10       107.       13.3         3.      18.00
 DATE OF MAXIMUM       1987-08-05 1987-05-07 1985-02-20 1987-06-05 1987-12-02
 STANDARD DEVIATION          0.02         7.        1.2         1.       2.87




                              ALK         pH         pH   SUSP SOL      PO4-P
                            TOTAL                          105 DEG        SOL
                            10102      10301      10302      10401      15254
                             mg/L   pH UNITS   pH UNITS       mg/L   mg/L PO4


 NO. OF L-FLAGGED VALUES        0          0          0          1         27
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       35         12         35         35          8
 MEAN                        0.23        7.2        7.2         4.      0.017
 MINIMUM                     0.10        7.0        6.8         1.      0.010
 DATE OF MINIMUM       1986-02-11 1987-03-09 1986-11-11 1985-05-16 1986-07-16
 10TH PERCENTILE             0.10        7.0        7.0         1.      0.010
 MEDIAN                      0.20        7.1        7.1         3.      0.020
 90TH PERCENTILE             0.30        7.4        7.4         7.      0.020
 MAXIMUM                     0.40        7.5        7.5        13.      0.040
 DATE OF MAXIMUM       1985-03-22 1987-05-07 1986-10-09 1987-03-09 1986-01-10
 STANDARD DEVIATION          0.07        0.2        0.2         3.      0.006




                               Cl    P,P-DDT        DDT    P,P-DDE    LINDANE
                             DISS                 TOTAL                      
                            17203      18000      18002      18020      18070
                          mg/L Cl       ug/L       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES        0          1          1          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       36          1          1          0          2
 MEAN                         10.      3.650      0.004      0.400      0.003
 MINIMUM                       6.                                            
 DATE OF MINIMUM       1985-12-06                                            
 10TH PERCENTILE               7.                                            
 MEDIAN                        9.                                            
 90TH PERCENTILE              11.                                            
 MAXIMUM                      27.                                            
 DATE OF MAXIMUM       1985-01-22                                            
 STANDARD DEVIATION            4.                                            




                           ALDRIN   DIELDRIN        BHC         Cr         Cr
                                                             TOTAL       DISS
                            18130      18150      18814      24002      24052
                             ug/L       ug/L       ug/L    mg/L Cr    mg/L Cr


 NO. OF L-FLAGGED VALUES        2          1          0         26          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        0          1          1          7         12
 MEAN                       0.200      0.450      3.000      0.002      0.001
 MINIMUM                                                     0.001      0.001
 DATE OF MINIMUM                                        1985-11-04 1987-03-09
 10TH PERCENTILE                                             0.001      0.001
 MEDIAN                                                      0.001      0.001
 90TH PERCENTILE                                             0.003      0.002
 MAXIMUM                                                     0.028      0.003
 DATE OF MAXIMUM                                        1987-01-09 1987-01-09
 STANDARD DEVIATION                                          0.005      0.001




                               Ni         Ni         Cu         Cu         Zn
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            28001      28101      29006      29106      30004
                          mg/L Ni    mg/L Ni    mg/L Cu    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES       20          9          5          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14          3         29         12         34
 MEAN                       0.002      0.002      0.003      0.002      0.011
 MINIMUM                    0.002      0.002      0.002      0.002      0.004
 DATE OF MINIMUM       1985-09-17 1987-01-09 1986-03-13 1987-01-09 1987-08-05
 10TH PERCENTILE            0.002      0.002      0.002      0.002      0.005
 MEDIAN                     0.002      0.002      0.003      0.002      0.010
 90TH PERCENTILE            0.003      0.002      0.004      0.002      0.017
 MAXIMUM                    0.003      0.002      0.007      0.003      0.028
 DATE OF MAXIMUM       1985-08-12 1987-12-02 1985-02-20 1987-02-11 1987-05-07
 STANDARD DEVIATION         0.000      0.000      0.001      0.000      0.006





                               Zn         Cd         Cd         Pb         Pb
                             DISS      TOTAL       DISS      TOTAL       DISS
                            30104      48001      48101      82001      82101
                          mg/L Zn    mg/L Cd    mg/L Cd    mg/L Pb    mg/L Pb


 NO. OF L-FLAGGED VALUES        0         33          0          6         10
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12          1         12         28          2
 MEAN                       0.006      0.506      0.001      0.005      0.002
 MINIMUM                    0.002      0.001      0.001      0.002      0.002
 DATE OF MINIMUM       1987-08-05 1987-07-02 1987-01-09 1986-01-10 1987-03-09
 10TH PERCENTILE            0.002      0.500      0.001      0.002      0.002
 MEDIAN                     0.006      0.500      0.001      0.003      0.002
 90TH PERCENTILE            0.009      0.500      0.001      0.010      0.003
 MAXIMUM                    0.010      1.000      0.001      0.028      0.004
 DATE OF MAXIMUM       1987-01-09 1985-10-10 1987-12-02 1987-12-02 1987-01-09
 STANDARD DEVIATION         0.002      0.128      0.000      0.005      0.001




                             INST
                           DISCHG
                            97160
                             m3/S


 NO. OF L-FLAGGED VALUES        0
 NO. OF G-FLAGGED VALUES        0
 NO. OF UNFLAGGED VALUES       35
 MEAN                        39.4
 MINIMUM                      6.6
 DATE OF MINIMUM       1987-05-07
 10TH PERCENTILE              6.9
 MEDIAN                      32.3
 90TH PERCENTILE             79.8
 MAXIMUM                    135.6
 DATE OF MAXIMUM       1986-12-04
 STANDARD DEVIATION          36.4





 STATION - RIVER MERSEY                             STATION NO. 027007
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       4.0
 LOCATION - OCT. 0  LAT. 53/23/13  LONG. 002/34/35  ELEVATION(M)   5.6
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-02 TO 1987-12-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2      NO2-N      NO3-N
                             COND                                            
                            02041      02061      07105      07207      07313
                            us/cm      deg C     mg/L N     mg/L N     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      171         69         69        152        153
 MEAN                        631.       10.9       3.17       0.26       3.09
 MINIMUM                     300.        1.0       2.19       0.02       1.95
 DATE OF MINIMUM       1986-08-27 1987-01-07 1987-06-10 1987-01-28 1987-07-15
 10TH PERCENTILE             430.        4.9       2.73       0.10       2.55
 MEDIAN                      605.       11.0       3.20       0.20       3.10
 90TH PERCENTILE             858.       16.0       3.66       0.52       3.55
 MAXIMUM                     998.       20.0       4.40       0.78       5.00
 DATE OF MAXIMUM       1986-10-08 1987-07-15 1987-05-06 1985-08-07 1986-10-01
 STANDARD DEVIATION          164.        4.7       0.42       0.18       0.47




                              NH3    PERCENT         O2        BOD        COD
                                      DO SAT       DISS                      
                            07556      08001      08101      08201      08301
                           mg/L N    PERCENT    mg/L O2    mg/L O2    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      171         64        162         68        150
 MEAN                        4.39        65.        6.8         5.        44.
 MINIMUM                     1.15        18.        1.9         2.        24.
 DATE OF MINIMUM       1986-01-22 1987-10-07 1987-10-07 1987-08-12 1985-01-02
 10TH PERCENTILE             1.95        46.        4.1         3.        31.
 MEDIAN                      4.30        70.        6.7         4.        43.
 90TH PERCENTILE             6.93        80.        9.6         7.        58.
 MAXIMUM                    10.20        84.       12.4        12.       114.
 DATE OF MAXIMUM       1986-10-08 1987-04-01 1986-01-08 1987-08-11 1986-11-19
 STANDARD DEVIATION          1.84        15.        2.1         2.        12.




                              ALK        ALK         pH         pH   SUSP SOL
                            TOTAL      TOTAL                          105 DEG
                            10101      10102      10301      10302      10401
                             mg/L       mg/L   pH UNITS   pH UNITS       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       68        151         69        153        168
 MEAN                      114.81       2.24        7.5        7.4        21.
 MINIMUM                    45.00       0.90        7.0        6.9         2.
 DATE OF MINIMUM       1987-03-25 1987-03-25 1987-03-04 1986-11-19 1985-07-24
 10TH PERCENTILE            89.40       1.60        7.2        7.2         5.
 MEDIAN                    116.00       2.30        7.5        7.4        12.
 90TH PERCENTILE           139.20       2.80        7.7        7.7        42.
 MAXIMUM                   170.00       3.40        8.0        8.2       281.
 DATE OF MAXIMUM       1987-12-16 1987-12-16 1987-08-05 1986-12-03 1986-11-19
 STANDARD DEVIATION         21.24       0.49        0.2        0.2        32.




                               Na         Mg         Si      PO4-P         Cl
                             DISS       DISS   REACTIVE        SOL       DISS
                            11105      12102      14101      15254      17201
                          mg/L Na    mg/L Mg   mg/LSiO2   mg/L PO4    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        5         77        140        149        150
 MEAN                         64.         9.       7.47      1.269        88.
 MINIMUM                      32.         5.       4.10      0.150        29.
 DATE OF MINIMUM       1986-11-26 1987-06-15 1987-04-29 1986-11-26 1986-08-27
 10TH PERCENTILE                          7.       6.15      0.495        47.
 MEDIAN                       58.         9.       7.45      1.180        81.
 90TH PERCENTILE                         11.       8.80      2.250       138.
 MAXIMUM                     106.        14.      10.40      3.400       203.
 DATE OF MAXIMUM       1986-09-17 1987-07-15 1986-10-01 1986-10-15 1985-01-23
 STANDARD DEVIATION           31.         2.       1.02      0.674        34.




                               Cl        DDT    LINDANE     ALDRIN   DIELDRIN
                             DISS      TOTAL                                 
                            17203      18002      18070      18130      18150
                          mg/L Cl       ug/L       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES        0         10          1         11          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       68          1         10          0          9
 MEAN                         79.      0.033      0.022      0.008      0.013
 MINIMUM                      37.      0.030      0.006      0.007      0.012
 DATE OF MINIMUM       1987-08-26 1987-06-24 1987-10-14 1987-06-24 1987-06-24
 10TH PERCENTILE              43.      0.030      0.006      0.007      0.012
 MEDIAN                       71.      0.030      0.018      0.007      0.012
 90TH PERCENTILE             119.      0.030      0.038      0.007      0.012
 MAXIMUM                     175.      0.060      0.068      0.014      0.024
 DATE OF MAXIMUM       1987-04-27 1987-12-16 1987-06-24 1987-12-16 1987-12-16
 STANDARD DEVIATION           33.      0.009      0.018      0.002      0.004




                                K         Ca         Cr         Mn         Fe
                             DISS       DISS      TOTAL      TOTAL      TOTAL
                            19105      20103      24002      25004      26004
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          0         24          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5         81         82         96        106
 MEAN                         6.7     45.061      0.013       0.26       0.86
 MINIMUM                      4.8     26.000      0.005       0.03       0.08
 DATE OF MINIMUM       1986-11-26 1987-06-03 1985-04-03 1986-04-16 1986-02-05
 10TH PERCENTILE                      37.450      0.007       0.17       0.50
 MEDIAN                       6.8     44.500      0.010       0.23       0.73
 90TH PERCENTILE                      52.500      0.021       0.34       1.25
 MAXIMUM                      8.6     59.500      0.070       1.55       4.18
 DATE OF MAXIMUM       1986-09-17 1987-05-20 1987-07-29 1986-05-14 1987-03-25
 STANDARD DEVIATION           1.7      6.037      0.008       0.15       0.49





                               Ni         Cu         Zn         As         Cd
                            TOTAL      TOTAL      TOTAL      TOTAL      TOTAL
                            28001      29006      30004      33003      48001
                          mg/L Ni    mg/L Cu    mg/L Zn    mg/L As    mg/L Cd


 NO. OF L-FLAGGED VALUES        0          0          0          1          6
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES      103        103        103          0         97
 MEAN                       0.009      0.010      0.038      0.000      0.203
 MINIMUM                    0.005      0.003      0.013                 0.000
 DATE OF MINIMUM       1985-04-17 1986-08-06 1985-08-07            1987-05-15
 10TH PERCENTILE            0.006      0.006      0.020                 0.022
 MEDIAN                     0.009      0.008      0.032                 0.160
 90TH PERCENTILE            0.013      0.015      0.057                 0.388
 MAXIMUM                    0.019      0.031      0.185                 0.910
 DATE OF MAXIMUM       1987-12-16 1987-03-25 1987-03-25            1986-07-23
 STANDARD DEVIATION         0.003      0.005      0.022                 0.178




                               Ba         Hg         Pb         Pb       INST
                            TOTAL       DISS      TOTAL       DISS     DISCHG
                            80011      80111      82001      82101      97160
                          ug/L Hg    ug/L Hg    mg/L Pb    mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES       33          2          2          1          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       49          1        101          0        137
 MEAN                       0.254      0.077      0.011      0.007       35.2
 MINIMUM                    0.050                 0.003                   7.2
 DATE OF MINIMUM       1985-12-11            1986-07-09            1986-09-24
 10TH PERCENTILE            0.063                 0.004                  11.6
 MEDIAN                     0.100                 0.008                  26.0
 90TH PERCENTILE            0.224                 0.021                  68.1
 MAXIMUM                    6.750                 0.056                 172.4
 DATE OF MAXIMUM       1987-05-26            1987-11-23            1985-01-30
 STANDARD DEVIATION         0.879                 0.010                  26.5





 STATION - RIVER TWEED ABOVE GALAFOOT               STATION NO. 027008
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       0.6
 LOCATION - OCT. 0  LAT. 55/36/12  LONG. 002/46/43  ELEVATION(M)  91.7
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-03 TO 1987-12-29

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2      NO3-N        NH3
                             COND                                            
                            02041      02061      07105      07314      07554
                            us/cm      deg C     mg/L N     mg/L N     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       51        147         51        148        148
 MEAN                        140.        8.7       1.22       1.22       0.08
 MINIMUM                      86.        0.0       0.60       0.50       0.02
 DATE OF MINIMUM       1987-12-29 1985-12-30 1987-09-23 1986-06-10 1985-09-04
 10TH PERCENTILE             111.        3.0       0.80       0.80       0.03
 MEDIAN                      144.        9.0       1.15       1.15       0.08
 90TH PERCENTILE             159.       14.5       1.69       1.70       0.13
 MAXIMUM                     199.       19.0       2.50       3.45       0.17
 DATE OF MAXIMUM       1987-12-15 1987-07-07 1987-01-16 1985-07-31 1986-08-05
 STANDARD DEVIATION           20.        4.6       0.37       0.39       0.04




                          PERCENT         O2        BOD     PERM V         pH
                           DO SAT       DISS                                 
                            08001      08101      08201      08401      10301
                          PERCENT    mg/L O2    mg/L O2    mg/L O2   pH UNITS


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       51        144         51        147         51
 MEAN                         98.       11.6         2.         3.        7.9
 MINIMUM                      71.        9.1         1.         1.        7.3
 DATE OF MINIMUM       1987-12-21 1985-10-02 1987-10-20 1985-01-15 1987-01-06
 10TH PERCENTILE              88.        9.8         1.         1.        7.4
 MEDIAN                       95.       11.4         2.         2.        7.8
 90TH PERCENTILE             109.       13.4         3.         6.        8.6
 MAXIMUM                     137.       16.9         3.        19.        9.2
 DATE OF MAXIMUM       1987-05-13 1985-05-07 1987-12-29 1985-07-23 1987-05-13
 STANDARD DEVIATION           11.        1.5         1.         2.        0.4




                               pH   SUSP SOL         Si   SULPHATE   SULPHATE
                                     105 DEG   REACTIVE                      
                            10302      10401      14101      16301      16309
                         pH UNITS       mg/L   mg/LSiO2   mg/L SO4   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      145        149         51        145         51
 MEAN                         7.9         6.       4.25         8.         9.
 MINIMUM                      7.0         1.       0.75         3.         7.
 DATE OF MINIMUM       1985-12-23 1985-02-20 1987-05-27 1986-03-25 1987-09-23
 10TH PERCENTILE              7.3         1.       1.96         6.         8.
 MEDIAN                       7.8         3.       4.28         8.         8.
 90TH PERCENTILE              8.5        11.       5.95        10.        10.
 MAXIMUM                      9.9        60.       6.63        26.        11.
 DATE OF MAXIMUM       1985-05-07 1986-10-30 1987-12-21 1986-10-07 1987-02-09
 STANDARD DEVIATION           0.5         8.       1.51         2.         1.




                               Cl   FAEC COL       INST
                             DISS                DISCHG
                            17204      36012      97160
                          mg/L Cl   No/100ml       m3/S


 NO. OF L-FLAGGED VALUES        0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES      148        117        125
 MEAN                         12.      1603.       40.4
 MINIMUM                       6.       100.        7.3
 DATE OF MINIMUM       1987-09-23 1987-03-03 1986-07-22
 10TH PERCENTILE               8.       300.       11.4
 MEDIAN                       12.      1200.       25.4
 90TH PERCENTILE              14.      3000.       85.9
 MAXIMUM                      22.     11000.      201.4
 DATE OF MAXIMUM       1986-02-17 1985-07-23 1986-12-09
 STANDARD DEVIATION            3.      1565.       36.2





 STATION - RIVER CARRON                             STATION NO. 027009
 COUNTRY - UNITED KINGDOM                           DEPTH(M)       0.8
 LOCATION - OCT. 0  LAT. 57/26/18  LONG. 005/26/51  ELEVATION(M)   3.5
 REGIONAL CENTRE - EURA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-15 TO 1987-12-10

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     NO3NO2      NO2-N      NO3-N
                             COND                                            
                            02041      02061      07105      07207      07313
                            us/cm      deg C     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0         13          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       34         36         12         23         34
 MEAN                         39.        8.1       0.06       0.00       0.06
 MINIMUM                      22.        2.0       0.03       0.00       0.03
 DATE OF MINIMUM       1985-07-17 1985-02-14 1987-09-23 1986-01-29 1986-10-27
 10TH PERCENTILE              27.        2.6       0.03       0.00       0.04
 MEDIAN                       37.        7.8       0.06       0.00       0.06
 90TH PERCENTILE              50.       13.2       0.09       0.01       0.10
 MAXIMUM                      75.       16.6       0.10       0.01       0.11
 DATE OF MAXIMUM       1986-01-29 1987-07-23 1987-12-10 1985-12-17 1985-02-14
 STANDARD DEVIATION           11.        4.0       0.02       0.00       0.02




                              NH3        NH3    PERCENT         O2        BOD
                                                 DO SAT       DISS           
                            07555      07556      08001      08101      08201
                           mg/L N     mg/L N    PERCENT    mg/L O2    mg/L O2


 NO. OF L-FLAGGED VALUES        1          2          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       11         34         12         36         12
 MEAN                        0.01       0.01        94.       11.3         1.
 MINIMUM                     0.00       0.00        86.        9.3         0.
 DATE OF MINIMUM       1987-07-23 1986-11-26 1987-11-18 1987-07-23 1987-06-23
 10TH PERCENTILE             0.00       0.00        86.       10.1         0.
 MEDIAN                      0.01       0.01        95.       11.2         1.
 90TH PERCENTILE             0.01       0.01        98.       12.7         1.
 MAXIMUM                     0.01       0.03       101.       13.7         2.
 DATE OF MAXIMUM       1987-03-17 1985-12-17 1987-08-19 1986-02-12 1987-09-23
 STANDARD DEVIATION          0.00       0.01         4.        1.1         0.




                              COD        ALK        ALK         pH         pH
                                       TOTAL      TOTAL                      
                            08301      10101      10102      10301      10302
                          mg/L O2       mg/L       mg/L   pH UNITS   pH UNITS


 NO. OF L-FLAGGED VALUES       14          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       21         12         36         12         34
 MEAN                          8.       4.12       0.06        6.5        6.4
 MINIMUM                       5.       1.70       0.00        6.1        5.4
 DATE OF MINIMUM       1985-02-14 1987-01-20 1985-07-17 1987-09-23 1986-01-29
 10TH PERCENTILE               5.       1.74       0.00        6.1        5.7
 MEDIAN                        8.       4.35       0.00        6.4        6.5
 90TH PERCENTILE              12.       6.55       0.13        6.8        6.9
 MAXIMUM                      24.       6.80       0.20        6.9        7.1
 DATE OF MAXIMUM       1985-08-20 1987-12-10 1985-02-14 1987-12-10 1986-07-09
 STANDARD DEVIATION            4.       1.86       0.07        0.2        0.5




                         SUSP SOL         Na         Mg   SULPHATE         Cl
                          105 DEG       DISS       DISS                  DISS
                            10401      11102      12103      16309      17204
                             mg/L    mg/L Na    mg/L Mg   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        5          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       30         12         12         12         36
 MEAN                          1.         4.         1.         1.        10.
 MINIMUM                       0.         3.         1.         0.         4.
 DATE OF MINIMUM       1985-04-23 1987-09-23 1987-01-20 1987-05-20 1985-09-24
 10TH PERCENTILE               0.         3.         1.         0.         6.
 MEDIAN                        1.         4.         1.         1.         9.
 90TH PERCENTILE               3.         4.         1.         2.        13.
 MAXIMUM                       5.         5.         1.         3.        26.
 DATE OF MAXIMUM       1985-07-17 1987-06-23 1987-12-10 1987-06-23 1986-01-29
 STANDARD DEVIATION            1.         1.         0.         1.         4.




                                K         Ca         Cr         Ni         Cu
                             DISS       DISS      TOTAL      TOTAL      TOTAL
                            19102      20101      24002      28001      29006
                           mg/L K    mg/L Ca    mg/L Cr    mg/L Ni    mg/L Cu


 NO. OF L-FLAGGED VALUES        0          0         12         12         29
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       12         12          0          0          7
 MEAN                         0.3      1.708      0.001      0.008      0.004
 MINIMUM                      0.1      0.900      0.001      0.008      0.001
 DATE OF MINIMUM       1987-04-14 1987-01-20 1987-01-20 1987-01-20 1986-04-23
 10TH PERCENTILE              0.1      0.920      0.001      0.008      0.001
 MEDIAN                       0.3      1.800      0.001      0.008      0.001
 90TH PERCENTILE              0.4      2.480      0.001      0.008      0.007
 MAXIMUM                      0.4      2.600      0.001      0.008      0.007
 DATE OF MAXIMUM       1987-12-10 1987-12-10 1987-12-10 1987-12-10 1986-03-18
 STANDARD DEVIATION           0.1      0.605      0.000      0.000      0.003




                               Zn         As         Cd         Ba         Ba
                            TOTAL      TOTAL      TOTAL      TOTAL      TOTAL
                            30004      33007      48001      80011      80016
                          mg/L Zn    mg/L As    mg/L Cd    ug/L Hg    ug/L Hg


 NO. OF L-FLAGGED VALUES       13         12         29         31         10
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       23          0          7          4          2
 MEAN                       0.003      0.003      0.222      0.112      0.021
 MINIMUM                    0.001      0.003      0.000      0.010      0.020
 DATE OF MINIMUM       1985-02-14 1987-01-20 1987-01-20 1985-08-20 1987-01-20
 10TH PERCENTILE            0.001      0.003      0.100      0.020      0.020
 MEDIAN                     0.002      0.003      0.200      0.020      0.020
 90TH PERCENTILE            0.005      0.003      0.300      0.530      0.020
 MAXIMUM                    0.025      0.003      0.400      0.800      0.030
 DATE OF MAXIMUM       1985-06-20 1987-12-10 1987-07-23 1985-01-15 1987-08-19
 STANDARD DEVIATION         0.005      0.000      0.083      0.199      0.003




                               Pb       INST
                            TOTAL     DISCHG
                            82001      97160
                          mg/L Pb       m3/S


 NO. OF L-FLAGGED VALUES       33          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        3         36
 MEAN                       0.002       12.6
 MINIMUM                    0.001        1.1
 DATE OF MINIMUM       1985-07-17 1985-02-14
 10TH PERCENTILE            0.002        1.3
 MEDIAN                     0.002        4.6
 90TH PERCENTILE            0.002       39.5
 MAXIMUM                    0.003       62.5
 DATE OF MAXIMUM       1985-06-20 1986-10-27
 STANDARD DEVIATION         0.000       16.2





 STATION - LOUGH NEAGH                              STATION NO. 027010
 COUNTRY - UNITED KINGDOM                           DEPTH(M)      10.0
 LOCATION - OCT. 0  LAT. 54/37/05  LONG. 006/25/50  ELEVATION(M)  12.0
 REGIONAL CENTRE - EURA                             WATER TYPE   LAKE       

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-02 TO 1987-12-29

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                            INTEG       ELEC     NO3NO2         pH   SUSP SOL
                           SAMPLE       COND                          105 DEG
                            00190      02041      07105      10302      10401
                              N/A      us/cm     mg/L N   pH UNITS       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES      154        154        154        154        151
 MEAN                          1.       315.       0.37        8.4         8.
 MINIMUM                       1.       288.       0.01        7.3         3.
 DATE OF MINIMUM       1985-01-02 1987-09-28 1986-07-07 1985-08-29 1985-01-14
 10TH PERCENTILE               1.       297.       0.02        7.9         5.
 MEDIAN                        1.       316.       0.34        8.3         8.
 90TH PERCENTILE               1.       330.       0.79        8.9        12.
 MAXIMUM                       1.       368.       1.19        9.2        18.
 DATE OF MAXIMUM       1987-12-29 1985-09-02 1985-03-11 1987-06-22 1987-04-06
 STANDARD DEVIATION            0.        13.       0.30        0.4         3.




                               Si      PO4-P
                         REACTIVE        SOL
                            14101      15254
                         mg/LSiO2   mg/L PO4


 NO. OF L-FLAGGED VALUES        0          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES      153        147
 MEAN                        3.87      0.039
 MINIMUM                     0.04      0.000
 DATE OF MINIMUM       1986-04-14 1986-04-07
 10TH PERCENTILE             0.12      0.002
 MEDIAN                      4.15      0.049
 90TH PERCENTILE             7.49      0.065
 MAXIMUM                     9.76      0.092
 DATE OF MAXIMUM       1985-01-02 1985-10-28
 STANDARD DEVIATION          2.90      0.025





 STATION - RUTLAND WATER RESERVOIR                  STATION NO. 027011
 COUNTRY - UNITED KINGDOM                           DEPTH(M)      10.7
 LOCATION - OCT. 0  LAT. 52/39/25  LONG. 000/37/29  ELEVATION(M)  83.2
 REGIONAL CENTRE - EURA                             WATER TYPE   LAKE       

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-03-11 TO 1987-12-01

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             TEMP   CHLORO A     NO3NO2      NO2-N        NH3
                                                                             
                            02061      06711      07105      07207      07555
                            deg C       mg/L     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        0          0          0          0          1
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       49         54         52          0          0
 MEAN                        10.9    13.1088       2.90       0.12       0.05
 MINIMUM                      2.5     0.4000       1.40                      
 DATE OF MINIMUM       1987-02-23 1985-07-23 1985-11-04                      
 10TH PERCENTILE              4.0     2.8400       1.68                      
 MEDIAN                      10.5     8.6000       2.97                      
 90TH PERCENTILE             15.5    23.0300       4.15                      
 MAXIMUM                     18.0    67.6000       4.50                      
 DATE OF MAXIMUM       1986-06-30 1985-03-18 1986-04-21                      
 STANDARD DEVIATION           4.1    13.2072       0.82                      




                              NH3    PERCENT         pH         pH         Si
                                      DO SAT                         REACTIVE
                            07556      08001      10301      10302      14101
                           mg/L N    PERCENT   pH UNITS   pH UNITS   mg/LSiO2


 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          2          1          1         66
 MEAN                        0.05        94.        8.7        8.7       1.63
 MINIMUM                                                                 0.08
 DATE OF MINIMUM                                                   1985-03-25
 10TH PERCENTILE                                                         0.41
 MEDIAN                                                                  1.45
 90TH PERCENTILE                                                         3.10
 MAXIMUM                                                                 4.93
 DATE OF MAXIMUM                                                   1987-10-14
 STANDARD DEVIATION                                                      1.06




                            PO4-P   SULPHATE         Cl
                              SOL                  DISS
                            15254      16304      17201
                         mg/L PO4   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES        0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES       53          1         20
 MEAN                       0.094       133.        55.
 MINIMUM                    0.033                   51.
 DATE OF MINIMUM       1987-04-27            1987-07-28
 10TH PERCENTILE            0.054                   51.
 MEDIAN                     0.098                   55.
 90TH PERCENTILE            0.126                   57.
 MAXIMUM                    0.188                   59.
 DATE OF MAXIMUM       1985-12-16            1987-09-21
 STANDARD DEVIATION         0.029                    2.





 STATION - TUNSTALL RESERVOIR                       STATION NO. 027012
 COUNTRY - UNITED KINGDOM                           DEPTH(M)      16.9
 LOCATION - OCT. 0  LAT. 54/45/43  LONG. 001/53/56  ELEVATION(M) 219.5
 REGIONAL CENTRE - EURA                             WATER TYPE   LAKE       

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1986-01-21 TO 1987-12-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP       TEMP          B    PHENOLS
                             COND                             DISS           
                            02041      02061      02062      05102      06532
                            us/cm      deg C      deg C     mg/L B       mg/L


 NO. OF L-FLAGGED VALUES        0          0          0          0          5
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7         15          7          5          1
 MEAN                        105.        7.5        8.0        0.0      0.009
 MINIMUM                      82.        0.5        1.0        0.0      0.002
 DATE OF MINIMUM       1987-05-20 1986-02-18 1987-02-17 1987-02-17 1986-07-28
 10TH PERCENTILE                         0.8                                 
 MEDIAN                      102.        6.5        6.5        0.0      0.010
 90TH PERCENTILE                        12.8                                 
 MAXIMUM                     144.       16.0       16.0        0.1      0.010
 DATE OF MAXIMUM       1986-12-16 1987-08-18 1987-08-18 1987-11-17 1987-11-17
 STANDARD DEVIATION           20.        4.4        5.1        0.0      0.003




                               CN   CHLORO A     NO3NO2      NO2-N        NH3
                                                                             
                            06606      06711      07105      07207      07555
                          mg/L Cn       mg/L     mg/L N     mg/L N     mg/L N


 NO. OF L-FLAGGED VALUES        4          0          1          8          8
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          4         16          7          9
 MEAN                       0.010     1.8200       0.42       0.01       0.03
 MINIMUM                    0.010     0.9000       0.03       0.00       0.00
 DATE OF MINIMUM       1986-11-18 1987-02-17 1986-02-18 1986-08-21 1986-02-18
 10TH PERCENTILE                                   0.23       0.00       0.00
 MEDIAN                     0.010     1.4000       0.41       0.01       0.02
 90TH PERCENTILE                                   0.52       0.02       0.06
 MAXIMUM                    0.010     4.1000       0.66       0.02       0.18
 DATE OF MAXIMUM       1987-11-17 1987-05-20 1986-03-19 1987-11-17 1986-11-18
 STANDARD DEVIATION         0.000     1.3293       0.13       0.01       0.04




                          PERCENT         O2         O2        BOD        COD
                           DO SAT       DISS       DISS                      
                            08001      08101      08102      08201      08301
                          PERCENT    mg/L O2    mg/L O2    mg/L O2    mg/L O2


 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         18          8          0
 MEAN                         87.       10.2       10.5         1.        10.
 MINIMUM                      79.        8.5        8.5         0.           
 DATE OF MINIMUM       1987-02-17 1987-09-15 1987-09-15 1987-08-18           
 10TH PERCENTILE                                    8.7                      
 MEDIAN                       88.       10.4       10.4         1.           
 90TH PERCENTILE                                   12.1                      
 MAXIMUM                      95.       11.8       13.2         2.           
 DATE OF MAXIMUM       1987-03-17 1987-01-21 1986-02-18 1987-05-20           
 STANDARD DEVIATION            5.        1.2        1.4         1.           




                           PERM V          F        ALK         pH         pH
                                        DISS      TOTAL                      
                            08401      09105      10102      10301      10302
                          mg/L O2     mg/L F       mg/L   pH UNITS   pH UNITS


 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         18         12         24
 MEAN                          6.        0.1       6.41        7.2        6.9
 MINIMUM                       3.        0.1       0.10        6.8        5.9
 DATE OF MINIMUM       1987-05-20 1986-11-18 1987-04-28 1987-01-21 1986-06-30
 10TH PERCENTILE                                   0.18        6.8        6.2
 MEDIAN                        5.        0.1       0.30        7.1        6.9
 90TH PERCENTILE                                  17.00        7.6        7.6
 MAXIMUM                       8.        0.1      18.00        7.7        7.7
 DATE OF MAXIMUM       1987-09-15 1987-11-17 1987-09-15 1987-10-22 1987-10-22
 STANDARD DEVIATION            2.        0.0       7.41        0.3        0.5




                         SUSP SOL         Na         Na         Mg         Si
                          105 DEG       DISS       DISS       DISS   REACTIVE
                            10401      11102      11105      12102      14101
                             mg/L    mg/L Na    mg/L Na    mg/L Mg   mg/LSiO2


 NO. OF L-FLAGGED VALUES        3          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       14          4          5          5          4
 MEAN                          4.         4.         4.         4.       2.94
 MINIMUM                       1.         3.         3.         2.       2.50
 DATE OF MINIMUM       1986-07-28 1987-11-17 1987-11-17 1987-09-15 1987-05-20
 10TH PERCENTILE               1.                                            
 MEDIAN                        3.         4.         4.         3.       2.88
 90TH PERCENTILE               6.                                            
 MAXIMUM                      21.         4.         5.         6.       3.48
 DATE OF MAXIMUM       1987-05-20 1987-05-20 1986-11-18 1986-11-18 1987-11-17
 STANDARD DEVIATION            5.         1.         1.         1.       0.40




                            PO4-P          P   SULPHATE   SULPHATE         Cl
                              SOL      TOTAL                             DISS
                            15254      15405      16301      16303      17203
                         mg/L PO4     mg/L P   mg/L SO4   mg/L SO4    mg/L Cl


 NO. OF L-FLAGGED VALUES       10          1          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          4          7          4         16
 MEAN                       0.017      0.020        18.        18.        12.
 MINIMUM                    0.002      0.010         8.         8.         7.
 DATE OF MINIMUM       1987-08-18 1986-11-18 1987-11-17 1987-11-17 1987-11-17
 10TH PERCENTILE            0.003                                          8.
 MEDIAN                     0.010      0.010        17.        18.        10.
 90TH PERCENTILE            0.018                                         18.
 MAXIMUM                    0.120      0.050        29.        29.        20.
 DATE OF MAXIMUM       1986-12-16 1987-11-17 1987-05-20 1987-05-20 1986-02-18
 STANDARD DEVIATION         0.028      0.017         7.         9.         4.





                          P,P-DDT        DDT    P,P-DDE    LINDANE     ALDRIN
                                       TOTAL                                 
                            18000      18002      18020      18070      18130
                             ug/L       ug/L       ug/L       ug/L       ug/L


 NO. OF L-FLAGGED VALUES        3          0          3          0          3
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        1          3          1          3          4
 MEAN                       2.500      0.002      0.700      0.001      0.286
 MINIMUM                    2.500                 0.700                 0.001
 DATE OF MINIMUM       1986-11-18            1986-11-18            1987-02-17
 10TH PERCENTILE                                                             
 MEDIAN                     2.500                 0.700                 0.500
 90TH PERCENTILE                                                             
 MAXIMUM                    2.500                 0.700                 0.500
 DATE OF MAXIMUM       1987-11-17            1987-11-17            1987-02-17
 STANDARD DEVIATION         0.000                 0.000                 0.267




                         DIELDRIN       PCBS        BHC          K          K
                                                              DISS       DISS
                            18150      18165      18814      19102      19105
                             ug/L       ug/L       ug/L     mg/L K     mg/L K


 NO. OF L-FLAGGED VALUES        3          3          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          0          4          4          5
 MEAN                       0.400      0.005      0.700        1.0        1.0
 MINIMUM                    0.001                 0.400        0.9        0.9
 DATE OF MINIMUM       1987-02-17            1987-11-17 1987-02-17 1987-02-17
 10TH PERCENTILE                                                             
 MEDIAN                     0.700                 0.550        0.9        1.0
 90TH PERCENTILE                                                             
 MAXIMUM                    0.700                 1.300        1.2        1.2
 DATE OF MAXIMUM       1987-02-17            1986-11-18 1987-11-17 1987-11-17
 STANDARD DEVIATION         0.374                 0.408        0.1        0.2




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


 NO. OF L-FLAGGED VALUES        0          4          4          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        5          1          1         11          6
 MEAN                       8.880      0.010      0.010       0.09       0.04
 MINIMUM                    7.200      0.010      0.010       0.02       0.01
 DATE OF MINIMUM       1987-02-17 1986-11-18 1986-11-18 1987-06-29 1986-07-28
 10TH PERCENTILE                                              0.02           
 MEDIAN                     8.800      0.010      0.010       0.07       0.03
 90TH PERCENTILE                                              0.15           
 MAXIMUM                   10.800      0.010      0.010       0.22       0.12
 DATE OF MAXIMUM       1987-11-17 1987-11-17 1987-11-17 1987-05-20 1987-02-17
 STANDARD DEVIATION         1.397      0.000      0.000       0.06       0.04




                               Fe         Fe         Cu         Cu         Zn
                            TOTAL       DISS      TOTAL       DISS      TOTAL
                            26004      26104      29006      29106      30004
                          mg/L Fe    mg/L Fe    mg/L Cu    mg/L Cu    mg/L Zn


 NO. OF L-FLAGGED VALUES        0          0          1          2          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        7          6          4          3          4
 MEAN                        0.43       0.21      0.016      0.008      0.033
 MINIMUM                     0.02       0.14      0.003      0.003      0.010
 DATE OF MINIMUM       1987-12-16 1987-05-20 1987-05-20 1987-05-20 1986-07-28
 10TH PERCENTILE                                                             
 MEDIAN                      0.43       0.16      0.015      0.007      0.022
 90TH PERCENTILE                                                             
 MAXIMUM                     0.98       0.35      0.030      0.017      0.080
 DATE OF MAXIMUM       1987-05-20 1987-11-17 1987-02-17 1987-02-17 1987-09-15
 STANDARD DEVIATION          0.32       0.09      0.011      0.006      0.028




                               Zn   FAEC COL         Cd         Cd         Ba
                             DISS                 TOTAL       DISS      TOTAL
                            30104      36012      48001      48101      80011
                          mg/L Zn   No/100ml    mg/L Cd    mg/L Cd    ug/L Hg


 NO. OF L-FLAGGED VALUES        0          1          1          1          2
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        3          0          1          1          2
 MEAN                       0.026        10.      0.050      0.050      0.300
 MINIMUM                                                                0.100
 DATE OF MINIMUM                                                   1986-11-18
 10TH PERCENTILE                                                             
 MEDIAN                                                                 0.100
 90TH PERCENTILE                                                             
 MAXIMUM                                                                0.900
 DATE OF MAXIMUM                                                   1987-11-17
 STANDARD DEVIATION                                                     0.400




                               Hg         Pb         Pb
                             DISS      TOTAL       DISS
                            80111      82001      82101
                          ug/L Hg    mg/L Pb    mg/L Pb


 NO. OF L-FLAGGED VALUES        2          2          4
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        1          3          1
 MEAN                       0.367      0.010      0.005
 MINIMUM                               0.003      0.003
 DATE OF MINIMUM                  1987-05-20 1987-05-20
 10TH PERCENTILE                                       
 MEDIAN                                0.010      0.003
 90TH PERCENTILE                                       
 MAXIMUM                               0.019      0.010
 DATE OF MAXIMUM                  1987-02-17 1986-11-18
 STANDARD DEVIATION                    0.006      0.003





 STATION - PATCHAM PUMPING STATION                  STATION NO. 027013
 COUNTRY - UNITED KINGDOM                           DEPTH(M)      40.1
 LOCATION - OCT. 0  LAT. 50/52/59  LONG. 000/09/39  ELEVATION(M)  19.5
 REGIONAL CENTRE - EURA                             WATER TYPE   GROUNDWATER

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1986-12-15 TO 1987-11-04

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                           NO3NO2        NH3        ALK         pH         Na
                                                  TOTAL                  DISS
                            07105      07556      10102      10302      11102
                           mg/L N     mg/L N       mg/L   pH UNITS    mg/L Na


 NO. OF L-FLAGGED VALUES        0          4          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        4          1          5          5          5
 MEAN                        3.88       0.02       3.56        7.6        12.
 MINIMUM                     2.90       0.02       3.50        7.5        12.
 DATE OF MINIMUM       1986-12-15 1986-12-15 1987-05-18 1987-03-12 1987-07-22
 10TH PERCENTILE                                                             
 MEDIAN                      4.00       0.02       3.50        7.6        12.
 90TH PERCENTILE                                                             
 MAXIMUM                     4.60       0.02       3.70        7.9        13.
 DATE OF MAXIMUM       1987-07-22 1987-11-04 1986-12-15 1987-07-22 1987-03-12
 STANDARD DEVIATION          0.73       0.00       0.09        0.2         0.




                         SULPHATE         Mn         Fe
                                       TOTAL      TOTAL
                            16303      25004      26002
                         mg/L SO4    mg/L Mn    mg/L Fe


 NO. OF L-FLAGGED VALUES        0          5          2
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES        2          0          3
 MEAN                         16.       0.00       0.01
 MINIMUM                      14.       0.00       0.00
 DATE OF MINIMUM       1987-05-18 1986-12-15 1987-03-12
 10TH PERCENTILE                                       
 MEDIAN                       16.       0.00       0.01
 90TH PERCENTILE                                       
 MAXIMUM                      17.       0.00       0.01
 DATE OF MAXIMUM       1987-11-04 1987-11-04 1987-11-04
 STANDARD DEVIATION            1.       0.00       0.00





 STATION - SOUTH YORKSHIRE AQUIFER                  STATION NO. 027014
 COUNTRY - UNITED KINGDOM                           DEPTH(M)     138.0
 LOCATION - OCT. 0  LAT. 53/27/33  LONG. 001/00/12  ELEVATION(M)  25.4
 REGIONAL CENTRE - EURA                             WATER TYPE   GROUNDWATER

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-09-09 TO 1987-12-29

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC      NO2-N        NH3        ALK         pH
                             COND                            TOTAL           
                            02041      07207      07555      10102      10302
                            us/cm     mg/L N     mg/L N       mg/L   pH UNITS


 NO. OF L-FLAGGED VALUES        0         34         92          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES      106          2         13          9        107
 MEAN                        344.       0.01       0.01       2.10        7.9
 MINIMUM                     307.       0.01       0.01       2.00        7.4
 DATE OF MINIMUM       1985-09-09 1987-01-05 1985-09-09 1987-07-28 1986-05-28
 10TH PERCENTILE             321.       0.01       0.01                   7.8
 MEDIAN                      342.       0.01       0.01       2.10        7.9
 90TH PERCENTILE             367.       0.01       0.01                   8.0
 MAXIMUM                     387.       0.02       0.12       2.20        8.4
 DATE OF MAXIMUM       1987-08-18 1987-08-04 1986-10-06 1987-06-30 1987-02-02
 STANDARD DEVIATION           20.       0.00       0.01       0.05        0.1




                               Cl         Fe   FAEC COL
                             DISS      TOTAL           
                            17201      26002      36012
                          mg/L Cl    mg/L Fe   No/100ml


 NO. OF L-FLAGGED VALUES        0         62          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES       16         44          0
 MEAN                         21.       0.01         0.
 MINIMUM                      19.       0.01         0.
 DATE OF MINIMUM       1986-06-02 1985-11-11 1985-09-09
 10TH PERCENTILE              19.       0.01         0.
 MEDIAN                       21.       0.01         0.
 90TH PERCENTILE              23.       0.03         0.
 MAXIMUM                      24.       0.07         0.
 DATE OF MAXIMUM       1986-09-15 1986-03-17 1986-12-29
 STANDARD DEVIATION            1.       0.01         0.



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GEMS/WATER
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Last updated: 2001-07-30