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STATISTICS for URUGUAY

STATISTICS FOR URUGUAY


GEMS/WATER - STATISTICAL SUMMARY BY STATION     2002-02-18   PAGE 778

 STATION - RIO SANTA LUCIA                          STATION NO. 048013
 COUNTRY - URUGUAY                                  DEPTH(M)    9999.9
 LOCATION - OCT. 5  LAT. 34/31/00  LONG. 056/24/00  ELEVATION(M)   1.9
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-07 TO 1987-11-16

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     N KJEL      NO2-N      NO3-N
                             COND                                            
                            02041      02061      07001      07207      07313
                            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       17         16         16         17         16
 MEAN                        222.       17.7        0.8       0.03       0.25
 MINIMUM                     100.       10.0        0.1       0.00       0.08
 DATE OF MINIMUM       1986-08-05 1986-07-02 1987-01-27 1985-01-07 1985-01-07
 10TH PERCENTILE             107.       11.2        0.3       0.00       0.08
 MEDIAN                      210.       17.5        0.6       0.00       0.23
 90TH PERCENTILE             329.       25.0        1.3       0.07       0.37
 MAXIMUM                     368.       25.0        1.6       0.30       1.00
 DATE OF MAXIMUM       1987-01-27 1985-02-05 1987-07-27 1987-11-16 1986-11-26
 STANDARD DEVIATION           82.        5.4        0.4       0.07       0.22




                              NH3         O2        BOD        ALK         pH
                                        DISS                 TOTAL           
                            07554      08101      08201      10102      10302
                           mg/L N    mg/L O2    mg/L O2       mg/L   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       17         17         17         17         17
 MEAN                        0.05        7.5         2.     102.24        7.4
 MINIMUM                     0.00        5.0         0.      40.00        6.8
 DATE OF MINIMUM       1985-02-05 1987-11-16 1985-04-16 1986-08-05 1985-04-16
 10TH PERCENTILE             0.00        5.1         0.      44.20        6.8
 MEDIAN                      0.05        7.0         1.      90.00        7.3
 90TH PERCENTILE             0.05        9.0         5.     167.20        7.7
 MAXIMUM                     0.10       11.0         5.     176.00        8.0
 DATE OF MAXIMUM       1987-07-27 1987-05-27 1987-10-13 1987-01-27 1987-05-27
 STANDARD DEVIATION          0.02        1.5         2.      46.85        0.3




                         SUSP SOL         Na         Mg    P ORTHO          P
                          105 DEG       DISS       DISS      TOTAL      TOTAL
                            10401      11103      12103      15205      15405
                             mg/L    mg/L Na    mg/L Mg     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       16         16         17          1          6
 MEAN                         65.        23.         8.      0.200      0.237
 MINIMUM                      12.         2.         3.                 0.110
 DATE OF MINIMUM       1987-09-08 1987-09-08 1986-08-05            1987-01-27
 10TH PERCENTILE              13.         6.         3.                      
 MEDIAN                       42.        19.         7.                 0.155
 90TH PERCENTILE             157.        41.        12.                      
 MAXIMUM                     175.        48.        14.                 0.520
 DATE OF MAXIMUM       1987-10-13 1986-05-07 1987-01-27            1987-10-13
 STANDARD DEVIATION           58.        13.         4.                 0.167





                         SULPHATE         Cl     ORGANO          K         Ca
                                        DISS   CL CMPDS       DISS       DISS
                            16302      17201      17860      19103      20101
                         mg/L SO4    mg/L Cl       ug/L     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       17         17          7         16         17
 MEAN                         11.        16.      0.000        3.1     19.547
 MINIMUM                       2.         8.      0.000        1.0     10.100
 DATE OF MINIMUM       1986-08-05 1985-05-28 1986-09-16 1987-09-08 1985-05-28
 10TH PERCENTILE               2.         9.                   1.5     10.660
 MEDIAN                       10.        13.      0.000        2.9     17.600
 90TH PERCENTILE              20.        24.                   4.6     30.200
 MAXIMUM                      25.        27.      0.000        6.5     31.100
 DATE OF MAXIMUM       1987-01-27 1986-05-07 1987-10-13 1987-07-27 1985-01-07
 STANDARD DEVIATION            7.         6.      0.000        1.4      7.333




                               Cr         Zn   COLIFORM   FAEC COL         Cd
                            TOTAL      TOTAL      TOTAL                 TOTAL
                            24002      30004      36001      36011      48001
                          mg/L Cr    mg/L Zn   No/100ml   No/100ml    mg/L Cd


 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         16         10         11         16
 MEAN                       0.000      0.008      3317.       467.      0.000
 MINIMUM                    0.000      0.000        19.         0.      0.000
 DATE OF MINIMUM       1985-01-07 1985-04-16 1987-10-13 1985-01-07 1985-01-07
 10TH PERCENTILE            0.000      0.000        19.         0.      0.000
 MEDIAN                     0.000      0.000      2400.         0.      0.000
 90TH PERCENTILE            0.000      0.020      7000.      1123.      0.000
 MAXIMUM                    0.000      0.050      7000.      3500.      0.000
 DATE OF MAXIMUM       1987-11-16 1986-09-16 1985-05-28 1985-03-12 1987-11-16
 STANDARD DEVIATION         0.000      0.013      3293.      1072.      0.000




                               Ba         Pb
                            TOTAL      TOTAL
                            80011      82001
                          ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        0          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES       12         16
 MEAN                       0.000      0.000
 MINIMUM                    0.000      0.000
 DATE OF MINIMUM       1985-01-07 1985-01-07
 10TH PERCENTILE            0.000      0.000
 MEDIAN                     0.000      0.000
 90TH PERCENTILE            0.000      0.000
 MAXIMUM                    0.000      0.000
 DATE OF MAXIMUM       1987-11-16 1987-11-16
 STANDARD DEVIATION         0.000      0.000





 STATION - ACUIFERO RIVERA                          STATION NO. 048014
 COUNTRY - URUGUAY                                  DEPTH(M)    9999.9
 LOCATION - OCT. 5  LAT. 30/54/00  LONG. 055/32/00  ELEVATION(M)9999.9
 REGIONAL CENTRE - AMRA                             WATER TYPE   GROUNDWATER

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-07 TO 1986-12-02

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                              H2S       ELEC       TEMP     N KJEL      NO2-N
                                        COND                                 
                            01000      02041      02061      07001      07207
                             mg/L      us/cm      deg C     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        1          6          5          1          6
 MEAN                        0.00        73.       16.7        0.0       0.00
 MINIMUM                                 57.        5.0                  0.00
 DATE OF MINIMUM                  1986-08-04 1985-06-03            1985-01-07
 10TH PERCENTILE                                                             
 MEDIAN                                  74.       19.5                  0.00
 90TH PERCENTILE                                                             
 MAXIMUM                                 85.       20.0                  0.00
 DATE OF MAXIMUM                  1985-06-03 1986-12-02            1986-12-02
 STANDARD DEVIATION                       9.        6.6                  0.00




                            NO3-N        NH3         O2        BOD          F
                                                   DISS                  DISS
                            07313      07554      08101      08201      09104
                           mg/L N     mg/L N    mg/L O2    mg/L O2     mg/L F


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          6          6          2          1
 MEAN                        1.47       0.00        7.3         2.        0.1
 MINIMUM                     0.45       0.00        6.4                      
 DATE OF MINIMUM       1985-06-03 1985-01-07 1986-08-04                      
 10TH PERCENTILE                                                             
 MEDIAN                      0.90       0.00        7.3                      
 90TH PERCENTILE                                                             
 MAXIMUM                     5.00       0.00        7.8                      
 DATE OF MAXIMUM       1986-12-02 1986-12-02 1986-05-05                      
 STANDARD DEVIATION          1.75       0.00        0.5                      




                              ALK         pH         Na         Mg          P
                            TOTAL                  DISS       DISS      TOTAL
                            10102      10302      11103      12103      15405
                             mg/L   pH UNITS    mg/L Na    mg/L Mg     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          6          6          6          1
 MEAN                       32.00        6.1         2.         7.      0.390
 MINIMUM                    18.00        5.5         2.         2.           
 DATE OF MINIMUM       1985-06-03 1985-06-03 1985-11-11 1986-08-04           
 10TH PERCENTILE                                                             
 MEDIAN                     35.00        6.1         3.         3.           
 90TH PERCENTILE                                                             
 MAXIMUM                    36.00        6.5         3.        27.           
 DATE OF MAXIMUM       1986-12-02 1986-08-04 1986-12-02 1986-12-02           
 STANDARD DEVIATION          7.04        0.4         1.        10.           




                         SULPHATE         Cl         Cl          K         Ca
                                        DISS       DISS       DISS       DISS
                            16302      17201      17204      19103      20101
                         mg/L SO4    mg/L Cl    mg/L Cl     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          5          1          6          6
 MEAN                          0.         5.         4.        1.5      9.483
 MINIMUM                       0.         2.                   0.5      8.400
 DATE OF MINIMUM       1985-01-07 1986-08-04            1985-11-11 1985-01-07
 10TH PERCENTILE                                                             
 MEDIAN                        0.         3.                   1.5      9.400
 90TH PERCENTILE                                                             
 MAXIMUM                       0.        10.                   2.4     10.900
 DATE OF MAXIMUM       1986-12-02 1985-06-03            1986-12-02 1986-08-04
 STANDARD DEVIATION            0.         4.                   0.6      0.895




                               Cr         Zn   COLIFORM   FAEC COL         Cd
                            TOTAL      TOTAL      TOTAL                 TOTAL
                            24002      30004      36001      36011      48001
                          mg/L Cr    mg/L Zn   No/100ml   No/100ml    mg/L Cd


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES        6          6          6          6          6
 MEAN                       0.000      0.008         0.         0.      0.000
 MINIMUM                    0.000      0.000         0.         0.      0.000
 DATE OF MINIMUM       1985-01-07 1985-01-07 1985-01-07 1985-01-07 1985-01-07
 10TH PERCENTILE                                                             
 MEDIAN                     0.000      0.000         0.         0.      0.000
 90TH PERCENTILE                                                             
 MAXIMUM                    0.000      0.035         0.         0.      0.000
 DATE OF MAXIMUM       1986-12-02 1986-08-04 1986-12-02 1986-12-02 1986-12-02
 STANDARD DEVIATION         0.000      0.014         0.         0.      0.000




                               Ba         Pb
                            TOTAL      TOTAL
                            80011      82001
                          ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        0          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES        6          6
 MEAN                       0.000      0.000
 MINIMUM                    0.000      0.000
 DATE OF MINIMUM       1985-01-07 1985-01-07
 10TH PERCENTILE                            
 MEDIAN                     0.000      0.000
 90TH PERCENTILE                            
 MAXIMUM                    0.000      0.000
 DATE OF MAXIMUM       1986-12-02 1986-12-02
 STANDARD DEVIATION         0.000      0.000





 STATION - RIO URUGUAY SALTO                        STATION NO. 048015
 COUNTRY - URUGUAY                                  DEPTH(M)      10.0
 LOCATION - OCT. 5  LAT. 31/23/00  LONG. 057/57/00  ELEVATION(M)   5.8
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-10 TO 1987-11-24

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                              H2S       ELEC       TEMP     N KJEL      NO2-N
                                        COND                                 
                            01000      02041      02061      07001      07207
                             mg/L      us/cm      deg C     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        1         19         19         18         19
 MEAN                        0.00        46.       20.0        0.3       0.00
 MINIMUM                                 24.       13.0        0.1       0.00
 DATE OF MINIMUM                  1987-10-15 1987-05-25 1986-01-13 1985-01-10
 10TH PERCENTILE                         35.       14.8        0.1       0.00
 MEDIAN                                  43.       19.0        0.3       0.00
 90TH PERCENTILE                         62.       25.1        0.5       0.01
 MAXIMUM                                 70.       26.0        0.9       0.02
 DATE OF MAXIMUM                  1986-07-01 1986-01-13 1986-05-05 1987-11-24
 STANDARD DEVIATION                      11.        3.8        0.2       0.01




                            NO3-N        NH3         O2        BOD        ALK
                                                   DISS                 TOTAL
                            07313      07554      08101      08201      10102
                           mg/L N     mg/L N    mg/L O2    mg/L O2       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       18         19         19         19         19
 MEAN                        0.36       0.03        8.1         1.      25.05
 MINIMUM                     0.23       0.00        3.6         0.      16.00
 DATE OF MINIMUM       1985-02-05 1985-02-05 1985-05-27 1986-08-04 1986-05-05
 10TH PERCENTILE             0.23       0.00        6.5         0.      16.00
 MEDIAN                      0.23       0.05        8.0         1.      24.00
 90TH PERCENTILE             0.48       0.05        9.4         2.      32.40
 MAXIMUM                     1.00       0.05        9.8         2.      38.00
 DATE OF MAXIMUM       1986-11-24 1985-11-18 1985-08-08 1985-01-10 1986-07-01
 STANDARD DEVIATION          0.21       0.03        1.4         1.       6.34




                               pH   SUSP SOL         Na         Mg    P ORTHO
                                     105 DEG       DISS       DISS      TOTAL
                            10302      10401      11103      12103      15205
                         pH UNITS       mg/L    mg/L Na    mg/L Mg     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         18         19         19          1
 MEAN                         7.2        26.         3.         3.      0.030
 MINIMUM                      6.6         8.         1.         1.           
 DATE OF MINIMUM       1985-01-10 1985-01-10 1985-02-05 1986-11-24           
 10TH PERCENTILE              6.7        11.         1.         1.           
 MEDIAN                       7.3        24.         2.         2.           
 90TH PERCENTILE              7.5        40.         5.         3.           
 MAXIMUM                      7.6        55.        16.         5.           
 DATE OF MAXIMUM       1986-09-16 1985-02-05 1985-05-27 1987-10-15           
 STANDARD DEVIATION           0.3        13.         3.         1.           




                                P   SULPHATE         Cl     ORGANO          K
                            TOTAL                  DISS   CL CMPDS       DISS
                            15405      16302      17201      17860      19103
                           mg/L P   mg/L SO4    mg/L Cl       ug/L     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        9         19         19          8         19
 MEAN                       0.070         0.         3.      0.000        1.5
 MINIMUM                    0.030         0.         1.      0.000        0.5
 DATE OF MINIMUM       1986-01-13 1985-01-10 1985-05-27 1986-09-16 1985-01-10
 10TH PERCENTILE                          0.         1.                   0.5
 MEDIAN                     0.070         0.         2.      0.000        1.2
 90TH PERCENTILE                          0.         4.                   1.6
 MAXIMUM                    0.120         0.         8.      0.000        6.8
 DATE OF MAXIMUM       1987-07-27 1987-11-24 1987-01-26 1987-11-24 1985-05-27
 STANDARD DEVIATION         0.026         0.         2.      0.000        1.4




                               Ca         Cr         Zn   COLIFORM   FAEC COL
                             DISS      TOTAL      TOTAL      TOTAL           
                            20101      24002      30004      36001      36011
                          mg/L Ca    mg/L Cr    mg/L Zn   No/100ml   No/100ml


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         19         19         12         17
 MEAN                       5.174      0.000      0.006      1559.       165.
 MINIMUM                    2.500      0.000      0.000        15.         4.
 DATE OF MINIMUM       1987-10-15 1985-01-10 1985-02-05 1986-08-04 1986-08-04
 10TH PERCENTILE            4.030      0.000      0.000        27.         7.
 MEDIAN                     5.000      0.000      0.000       210.        23.
 90TH PERCENTILE            5.890      0.000      0.013      3940.       673.
 MAXIMUM                    7.200      0.000      0.050      9300.       980.
 DATE OF MAXIMUM       1986-07-01 1987-11-24 1987-05-25 1985-02-05 1985-02-05
 STANDARD DEVIATION         0.973      0.000      0.012      2793.       307.




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


 NO. OF L-FLAGGED VALUES        0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES       19         14         19
 MEAN                       0.000      0.000      0.000
 MINIMUM                    0.000      0.000      0.000
 DATE OF MINIMUM       1985-01-10 1985-01-10 1985-01-10
 10TH PERCENTILE            0.000      0.000      0.000
 MEDIAN                     0.000      0.000      0.000
 90TH PERCENTILE            0.000      0.000      0.000
 MAXIMUM                    0.000      0.000      0.000
 DATE OF MAXIMUM       1987-11-24 1987-11-24 1987-11-24
 STANDARD DEVIATION         0.000      0.000      0.000





 STATION - RIO URUGUAY BELLA UNION                  STATION NO. 048038
 COUNTRY - URUGUAY                                  DEPTH(M)       8.0
 LOCATION - OCT. 5  LAT. 30/15/00  LONG. 057/35/00  ELEVATION(M)  34.5
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-07 TO 1987-11-18

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                              H2S       ELEC       TEMP     N KJEL      NO2-N
                                        COND                                 
                            01000      02041      02061      07001      07207
                             mg/L      us/cm      deg C     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        1         19         19         18         19
 MEAN                        0.00        56.       20.9        0.6       0.00
 MINIMUM                                 35.       14.0        0.3       0.00
 DATE OF MINIMUM                  1987-05-25 1986-09-17 1985-04-25 1985-01-07
 10TH PERCENTILE                         44.       14.0        0.3       0.00
 MEDIAN                                  58.       20.0        0.6       0.00
 90TH PERCENTILE                         69.       28.2        0.8       0.01
 MAXIMUM                                 76.       32.0        0.9       0.04
 DATE OF MAXIMUM                  1986-08-07 1986-01-03 1986-07-01 1985-02-04
 STANDARD DEVIATION                      10.        5.2        0.2       0.01




                            NO3-N        NH3         O2        BOD        ALK
                                                   DISS                 TOTAL
                            07313      07554      08101      08201      10102
                           mg/L N     mg/L N    mg/L O2    mg/L O2       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       18         19         19         19         19
 MEAN                        0.28       0.04        7.9         1.      28.63
 MINIMUM                     0.14       0.00        5.8         0.      20.00
 DATE OF MINIMUM       1985-02-04 1985-02-04 1985-04-25 1985-04-25 1985-04-25
 10TH PERCENTILE             0.14       0.00        6.5         0.      21.80
 MEDIAN                      0.23       0.05        8.0         1.      30.00
 90TH PERCENTILE             0.47       0.05        9.0         2.      36.00
 MAXIMUM                     1.00       0.10        9.4         2.      36.00
 DATE OF MAXIMUM       1986-11-25 1986-08-07 1987-05-25 1987-09-01 1987-11-18
 STANDARD DEVIATION          0.22       0.03        0.9         1.       5.04




                               pH   SUSP SOL         Na         Mg    P ORTHO
                                     105 DEG       DISS       DISS      TOTAL
                            10302      10401      11103      12103      15205
                         pH UNITS       mg/L    mg/L Na    mg/L Mg     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         19         19         19          1
 MEAN                         7.1        61.         4.         3.      0.070
 MINIMUM                      6.4        16.         2.         1.           
 DATE OF MINIMUM       1985-01-07 1985-04-25 1985-01-07 1987-05-25           
 10TH PERCENTILE              6.5        20.         2.         2.           
 MEDIAN                       7.1        58.         3.         3.           
 90TH PERCENTILE              7.5       101.         6.         4.           
 MAXIMUM                      7.6       112.        14.         4.           
 DATE OF MAXIMUM       1987-11-18 1985-05-29 1985-05-29 1987-01-26           
 STANDARD DEVIATION           0.3        29.         3.         1.           




                                P   SULPHATE         Cl     ORGANO          K
                            TOTAL                  DISS   CL CMPDS       DISS
                            15405      16302      17201      17860      19103
                           mg/L P   mg/L SO4    mg/L Cl       ug/L     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        9         19         19          8         19
 MEAN                       0.166         0.         3.      0.000        1.6
 MINIMUM                    0.100         0.         1.      0.000        0.6
 DATE OF MINIMUM       1986-11-25 1985-01-07 1987-05-25 1986-09-17 1985-01-07
 10TH PERCENTILE                          0.         1.                   1.0
 MEDIAN                     0.145         0.         2.      0.000        1.4
 90TH PERCENTILE                          0.         4.                   1.8
 MAXIMUM                    0.300         0.         5.      0.000        5.4
 DATE OF MAXIMUM       1987-07-31 1987-11-18 1987-10-15 1987-11-18 1985-05-29
 STANDARD DEVIATION         0.062         0.         1.      0.000        1.0




                               Ca         Cr         Zn   COLIFORM   FAEC COL
                             DISS      TOTAL      TOTAL      TOTAL           
                            20101      24002      30004      36001      36011
                          mg/L Ca    mg/L Cr    mg/L Zn   No/100ml   No/100ml


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         19         19         13         18
 MEAN                       6.337      0.000      0.016      5772.      1096.
 MINIMUM                    4.200      0.000      0.000       150.         9.
 DATE OF MINIMUM       1985-02-04 1985-01-07 1985-02-04 1985-03-18 1985-02-04
 10TH PERCENTILE            4.740      0.000      0.000       169.        18.
 MEDIAN                     5.900      0.000      0.000       460.       260.
 90TH PERCENTILE            7.680      0.000      0.023     20100.      1500.
 MAXIMUM                   10.100      0.000      0.180     24000.     12000.
 DATE OF MAXIMUM       1986-08-07 1987-11-18 1987-05-25 1986-11-25 1986-08-07
 STANDARD DEVIATION         1.421      0.000      0.042      8980.      2766.




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


 NO. OF L-FLAGGED VALUES        0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0
 NO. OF UNFLAGGED VALUES       19         14         19
 MEAN                       0.000      0.000      0.000
 MINIMUM                    0.000      0.000      0.000
 DATE OF MINIMUM       1985-01-07 1985-01-07 1985-01-07
 10TH PERCENTILE            0.000      0.000      0.000
 MEDIAN                     0.000      0.000      0.000
 90TH PERCENTILE            0.000      0.000      0.000
 MAXIMUM                    0.000      0.000      0.000
 DATE OF MAXIMUM       1987-11-18 1987-11-18 1987-11-18
 STANDARD DEVIATION         0.000      0.000      0.000





 STATION - RIO DE LA PLATA COLONIA                  STATION NO. 048039
 COUNTRY - URUGUAY                                  DEPTH(M)      10.0
 LOCATION - OCT. 5  LAT. 34/28/00  LONG. 057/51/00  ELEVATION(M)   0.2
 REGIONAL CENTRE - AMRA                             WATER TYPE   RIVER      

 PERIOD REQUESTED FROM  - 1985-01-01 TO 1987-12-31
 PERIOD OF RECORD FROM  - 1985-01-07 TO 1987-11-19

 STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED


                             ELEC       TEMP     N KJEL      NO2-N      NO3-N
                             COND                                            
                            02041      02061      07001      07207      07313
                            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       19         19         18         19         18
 MEAN                        100.       18.3        0.4       0.00       0.30
 MINIMUM                      30.       12.0        0.2       0.00       0.09
 DATE OF MINIMUM       1985-05-29 1986-08-05 1985-05-29 1985-01-07 1985-02-05
 10TH PERCENTILE              45.       12.0        0.2       0.00       0.13
 MEDIAN                       90.       19.0        0.4       0.00       0.23
 90TH PERCENTILE             155.       23.1        0.7       0.00       0.47
 MAXIMUM                     220.       26.0        0.9       0.01       1.00
 DATE OF MAXIMUM       1985-08-06 1987-01-26 1986-07-02 1987-10-09 1986-11-26
 STANDARD DEVIATION           49.        4.5        0.2       0.00       0.22




                              NH3         O2        BOD        ALK         pH
                                        DISS                 TOTAL           
                            07554      08101      08201      10102      10302
                           mg/L N    mg/L O2    mg/L O2       mg/L   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       19         19         19         19         19
 MEAN                        0.03        8.9         1.      36.84        7.4
 MINIMUM                     0.00        6.8         0.      20.00        6.6
 DATE OF MINIMUM       1985-02-05 1985-02-05 1985-08-06 1986-05-06 1985-01-07
 10TH PERCENTILE             0.00        7.5         0.      27.20        6.8
 MEDIAN                      0.05        8.8         1.      36.00        7.5
 90TH PERCENTILE             0.05       10.2         2.      44.60        7.6
 MAXIMUM                     0.10       10.6         2.      58.00        7.7
 DATE OF MAXIMUM       1987-10-09 1987-10-09 1985-01-07 1987-07-30 1985-05-29
 STANDARD DEVIATION          0.03        1.1         1.       8.31        0.3




                         SUSP SOL         Na         Mg    P ORTHO          P
                          105 DEG       DISS       DISS      TOTAL      TOTAL
                            10401      11103      12103      15205      15405
                             mg/L    mg/L Na    mg/L Mg     mg/L P     mg/L P


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       18         19         19          1          9
 MEAN                         47.         9.         3.      0.070      0.141
 MINIMUM                       2.         3.         2.                 0.090
 DATE OF MINIMUM       1987-10-09 1985-04-23 1985-05-29            1987-09-03
 10TH PERCENTILE              10.         4.         2.                      
 MEDIAN                       40.         7.         3.                 0.130
 90TH PERCENTILE             101.        13.         4.                      
 MAXIMUM                     115.        23.         7.                 0.230
 DATE OF MAXIMUM       1986-05-06 1986-01-03 1986-01-03            1986-11-26
 STANDARD DEVIATION           35.         5.         1.                 0.047




                         SULPHATE         Cl     ORGANO          K         Ca
                                        DISS   CL CMPDS       DISS       DISS
                            16302      17201      17860      19103      20101
                         mg/L SO4    mg/L Cl       ug/L     mg/L K    mg/L Ca


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          0          0
 NO. OF UNFLAGGED VALUES       19         19          8         19         19
 MEAN                          6.         9.      0.000        2.1      8.163
 MINIMUM                       0.         2.      0.000        0.8      5.600
 DATE OF MINIMUM       1985-05-29 1985-04-23 1986-09-17 1985-05-29 1987-11-19
 10TH PERCENTILE               0.         2.                   1.2      5.870
 MEDIAN                        4.         8.      0.000        2.0      8.400
 90TH PERCENTILE              13.        16.                   2.7      9.650
 MAXIMUM                      27.        26.      0.000        3.2     10.400
 DATE OF MAXIMUM       1986-01-03 1986-01-03 1987-11-19 1985-03-12 1986-07-02
 STANDARD DEVIATION            7.         6.      0.000        0.6      1.217




                               Cr         Zn   COLIFORM   FAEC COL         Cd
                            TOTAL      TOTAL      TOTAL                 TOTAL
                            24002      30004      36001      36011      48001
                          mg/L Cr    mg/L Zn   No/100ml   No/100ml    mg/L Cd


 NO. OF L-FLAGGED VALUES        0          0          0          0          0
 NO. OF G-FLAGGED VALUES        0          0          0          1          0
 NO. OF UNFLAGGED VALUES       19         19         12         17         19
 MEAN                       0.000      0.009      4449.       823.      0.000
 MINIMUM                    0.000      0.000        75.         0.      0.000
 DATE OF MINIMUM       1985-01-07 1985-02-05 1985-11-19 1985-11-19 1985-01-07
 10TH PERCENTILE            0.000      0.000        75.        16.      0.000
 MEDIAN                     0.000      0.000      1950.       190.      0.000
 90TH PERCENTILE            0.000      0.010      7890.      2400.      0.000
 MAXIMUM                    0.000      0.120     24000.      2900.      0.000
 DATE OF MAXIMUM       1987-11-19 1987-05-25 1986-07-02 1985-08-06 1987-11-19
 STANDARD DEVIATION         0.000      0.027      6732.      1006.      0.000




                               Ba         Pb
                            TOTAL      TOTAL
                            80011      82001
                          ug/L Hg    mg/L Pb


 NO. OF L-FLAGGED VALUES        0          0
 NO. OF G-FLAGGED VALUES        0          0
 NO. OF UNFLAGGED VALUES       14         19
 MEAN                       0.000      0.000
 MINIMUM                    0.000      0.000
 DATE OF MINIMUM       1985-01-07 1985-01-07
 10TH PERCENTILE            0.000      0.000
 MEDIAN                     0.000      0.000
 90TH PERCENTILE            0.000      0.000
 MAXIMUM                    0.000      0.000
 DATE OF MAXIMUM       1987-11-19 1987-11-19
 STANDARD DEVIATION         0.000      0.000




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Last updated: 2001-07-30