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STATISTICS FOR KENYA
GEMS/WATER - STATISTICAL SUMMARY BY STATION 2002-02-18 PAGE 401
STATION - LAKE NAIVASHA STATION NO. 112001
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 15/00/00 LONG. 036/00/00 ELEVATION(M) 11.0
REGIONAL CENTRE - AFRA WATER TYPE LAKE
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-07-11 TO 1987-04-16
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N NH3
COND
02041 02062 07207 07306 07555
us/cm deg C mg/L N mg/L N mg/L N
NO. OF L-FLAGGED VALUES 0 0 3 5 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 13 10 5 5 2
MEAN 325. 20.5 0.01 0.31 0.16
MINIMUM 140. 19.0 0.01 0.01
DATE OF MINIMUM 1985-07-11 1985-07-20 1985-07-11 1986-02-28
10TH PERCENTILE 142. 19.0 0.01
MEDIAN 335. 20.0 0.01 0.01
90TH PERCENTILE 385. 23.0 1.00
MAXIMUM 396. 24.0 0.02 2.00
DATE OF MAXIMUM 1987-04-16 1986-04-29 1986-06-13 1985-07-11
STANDARD DEVIATION 85. 1.7 0.00 0.67
O2 BOD COD F ALK
DISS DISS TOTAL
08102 08201 08301 09105 10101
mg/L O2 mg/L O2 mg/L O2 mg/L F mg/L
NO. OF L-FLAGGED VALUES 0 1 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 5 6 5 11 12
MEAN 9.1 7. 63. 2.3 154.33
MINIMUM 6.6 2. 40. 1.6 68.00
DATE OF MINIMUM 1987-04-16 1985-08-13 1987-02-02 1985-10-23 1985-08-13
10TH PERCENTILE 1.6 83.60
MEDIAN 8.9 6. 60. 1.9 161.00
90TH PERCENTILE 3.4 170.80
MAXIMUM 12.7 15. 107. 4.5 182.00
DATE OF MAXIMUM 1986-08-04 1985-07-11 1987-04-16 1985-08-21 1987-04-16
STANDARD DEVIATION 2.3 5. 26. 0.9 28.94
pH SUSP SOL Na Mg Si
105 DEG DISS DISS REACTIVE
10302 10401 11105 12103 14101
pH UNITS mg/L mg/L Na mg/L Mg 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 13 2 9 10 4
MEAN 8.4 56. 58. 10. 7.07
MINIMUM 7.6 38. 7. 1.40
DATE OF MINIMUM 1985-07-20 1986-06-13 1985-07-20 1986-04-29
10TH PERCENTILE 7.6 7.
MEDIAN 8.6 48. 9. 7.95
90TH PERCENTILE 8.9 15.
MAXIMUM 9.0 115. 20. 11.00
DATE OF MAXIMUM 1986-08-04 1985-08-21 1986-04-29 1987-02-02
STANDARD DEVIATION 0.5 26. 4. 4.75
P ORTHO P SULPHATE Cl K
TOTAL TOTAL DISS DISS
15205 15405 16302 17201 19103
mg/L P mg/L P mg/L SO4 mg/L Cl mg/L K
NO. OF L-FLAGGED VALUES 0 0 1 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 11 1 10 13 8
MEAN 0.110 0.010 4. 15. 23.6
MINIMUM 0.010 0. 4. 15.0
DATE OF MINIMUM 1985-07-20 1987-04-16 1985-08-13 1986-06-13
10TH PERCENTILE 0.010 0. 5.
MEDIAN 0.030 1. 17. 23.0
90TH PERCENTILE 0.302 8. 19.
MAXIMUM 0.570 17. 19. 33.0
DATE OF MAXIMUM 1985-08-13 1986-10-16 1987-04-16 1986-10-16
STANDARD DEVIATION 0.179 5. 5. 5.7
Ca Mn Fe Cu Zn
DISS TOTAL TOTAL TOTAL TOTAL
20101 25004 26004 29006 30004
mg/L Ca mg/L Mn mg/L Fe mg/L Cu mg/L Zn
NO. OF L-FLAGGED VALUES 0 3 2 1 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 10 9 10 0 1
MEAN 15.020 0.15 1.50 0.100 0.100
MINIMUM 6.900 0.01 0.10
DATE OF MINIMUM 1986-10-28 1985-07-20 1985-07-11
10TH PERCENTILE 6.900 0.01 0.10
MEDIAN 13.700 0.15 0.80
90TH PERCENTILE 20.000 0.28 3.41
MAXIMUM 31.000 0.36 6.90
DATE OF MAXIMUM 1985-08-21 1987-02-02 1986-10-28
STANDARD DEVIATION 6.728 0.12 2.04
Cd Pb INST
TOTAL TOTAL DISCHG
48001 82001 97160
mg/L Cd mg/L Pb m3/S
NO. OF L-FLAGGED VALUES 1 0 0
NO. OF G-FLAGGED VALUES 0 0 0
NO. OF UNFLAGGED VALUES 0 1 9
MEAN 0.100 1.200 645.3
MINIMUM 3.7
DATE OF MINIMUM 1986-02-28
10TH PERCENTILE
MEDIAN 42.0
90TH PERCENTILE
MAXIMUM 1884.2
DATE OF MAXIMUM 1986-08-04
STANDARD DEVIATION 929.3
STATION - LAKE VICTORIA STATION NO. 112002
COUNTRY - KENYA DEPTH(M) 80.0
LOCATION - OCT. 8 LAT. 07/30/00 LONG. 039/00/00 ELEVATION(M)1245.0
REGIONAL CENTRE - AFRA WATER TYPE LAKE
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1986-03-27 TO 1987-09-22
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N O2
COND DISS
02041 02062 07207 07306 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 1 1 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 4 1 2 3 1
MEAN 149. 26.0 0.02 0.90 6.8
MINIMUM 130. 0.01
DATE OF MINIMUM 1987-09-22 1986-03-27
10TH PERCENTILE
MEDIAN 152. 1.05
90TH PERCENTILE
MAXIMUM 160. 1.50
DATE OF MAXIMUM 1986-03-27 1987-04-23
STANDARD DEVIATION 13. 0.63
BOD F ALK pH Na
DISS TOTAL DISS
08201 09105 10101 10302 11105
mg/L O2 mg/L F mg/L pH UNITS mg/L Na
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 3 4 4 1
MEAN 3. 2.8 74.50 7.6 18.
MINIMUM 24.00 7.2
DATE OF MINIMUM 1987-02-10 1987-04-23
10TH PERCENTILE
MEDIAN 75.00 7.6
90TH PERCENTILE
MAXIMUM 124.00 8.2
DATE OF MAXIMUM 1987-09-22 1986-03-27
STANDARD DEVIATION 41.48 0.4
Mg P ORTHO SULPHATE Cl K
DISS TOTAL DISS DISS
12103 15205 16302 17201 19103
mg/L Mg mg/L P 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 1 4 1 3 1
MEAN 3. 0.262 2. 6. 5.0
MINIMUM 0.020
DATE OF MINIMUM 1986-03-27
10TH PERCENTILE
MEDIAN 0.290
90TH PERCENTILE
MAXIMUM 0.450
DATE OF MAXIMUM 1987-04-23
STANDARD DEVIATION 0.179
Ca Mn Fe INST
DISS TOTAL TOTAL DISCHG
20101 25004 26004 97160
mg/L Ca mg/L Mn mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0
NO. OF UNFLAGGED VALUES 1 4 3 3
MEAN 3.100 0.22 0.21 11.9
MINIMUM 0.07
DATE OF MINIMUM 1986-03-27
10TH PERCENTILE
MEDIAN 0.10
90TH PERCENTILE
MAXIMUM 0.60
DATE OF MAXIMUM 1987-09-22
STANDARD DEVIATION 0.26
STATION - SABAKI RIVER STATION NO. 112003
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 03/07/00 LONG. 039/49/20 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1987-02-16 TO 1987-11-10
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N O2
COND DISS
02041 02062 07207 07306 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 3 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 4 2 1 3 2
MEAN 750. 31.5 0.02 0.46 8.0
MINIMUM 520. 0.01
DATE OF MINIMUM 1987-05-26 1987-02-16
10TH PERCENTILE
MEDIAN 785. 0.01
90TH PERCENTILE
MAXIMUM 910. 0.05
DATE OF MAXIMUM 1987-11-10 1987-11-10
STANDARD DEVIATION 166. 0.02
F ALK pH Na Mg
DISS TOTAL DISS DISS
09105 10101 10302 11105 12103
mg/L F mg/L pH UNITS mg/L Na mg/L Mg
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 4 4 4 3 4
MEAN 1.0 199.00 8.0 109. 19.
MINIMUM 0.7 182.00 7.6 0.
DATE OF MINIMUM 1987-05-26 1987-05-26 1987-11-10 1987-11-10
10TH PERCENTILE
MEDIAN 1.1 202.00 8.1 22.
90TH PERCENTILE
MAXIMUM 1.3 210.00 8.2 31.
DATE OF MAXIMUM 1987-02-16 1987-02-26 1987-02-26 1987-05-26
STANDARD DEVIATION 0.3 12.38 0.3 13.
Si P ORTHO SULPHATE Cl K
REACTIVE TOTAL DISS DISS
14101 15205 16302 17201 19103
mg/LSiO2 mg/L P mg/L SO4 mg/L Cl mg/L K
NO. OF L-FLAGGED VALUES 0 1 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 3 3 3 4 2
MEAN 19.67 0.122 70. 87. 22.5
MINIMUM 0.010 42.
DATE OF MINIMUM 1987-11-10 1987-05-26
10TH PERCENTILE
MEDIAN 0.110 88.
90TH PERCENTILE
MAXIMUM 0.260 130.
DATE OF MAXIMUM 1987-02-26 1987-11-10
STANDARD DEVIATION 0.111 36.
Ca Mn Fe COLIFORM
DISS TOTAL TOTAL TOTAL
20101 25004 26004 36001
mg/L Ca mg/L Mn mg/L Fe No/100ml
NO. OF L-FLAGGED VALUES 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0
NO. OF UNFLAGGED VALUES 4 3 2 1
MEAN 23.000 1.32 5.75 35.
MINIMUM 12.000
DATE OF MINIMUM 1987-05-26
10TH PERCENTILE
MEDIAN 22.000
90TH PERCENTILE
MAXIMUM 36.000
DATE OF MAXIMUM 1987-11-10
STANDARD DEVIATION 9.899
STATION - TANA RIVER STATION NO. 112004
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 02/16/00 LONG. 040/07/00 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-06-01 TO 1987-11-27
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
H2S ELEC TEMP NO2-N NO3-N
COND
01000 02041 02062 07207 07306
mg/L us/cm deg C mg/L N mg/L N
NO. OF L-FLAGGED VALUES 0 0 0 3 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 1 8 6 2 4
MEAN 4.00 186. 25.2 0.02 0.20
MINIMUM 130. 22.5 0.01 0.03
DATE OF MINIMUM 1985-11-09 1985-06-01 1986-03-29 1986-03-29
10TH PERCENTILE
MEDIAN 201. 24.0 0.01 0.05
90TH PERCENTILE
MAXIMUM 221. 29.0 0.04 0.68
DATE OF MAXIMUM 1987-10-10 1987-10-10 1987-02-22 1987-02-22
STANDARD DEVIATION 33. 3.1 0.01 0.32
BOD COD F ALK pH
DISS TOTAL
08201 08301 09105 10101 10302
mg/L O2 mg/L O2 mg/L F 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 1 1 8 8 8
MEAN 1. 61. 0.5 72.38 7.6
MINIMUM 0.2 62.00 6.3
DATE OF MINIMUM 1985-11-09 1987-10-10 1987-10-10
10TH PERCENTILE
MEDIAN 0.4 71.00 7.6
90TH PERCENTILE
MAXIMUM 0.9 85.00 8.0
DATE OF MAXIMUM 1985-06-01 1985-06-01 1986-03-29
STANDARD DEVIATION 0.3 8.85 0.6
SUSP SOL Na Mg Si P ORTHO
105 DEG DISS DISS REACTIVE TOTAL
10401 11105 12103 14101 15205
mg/L mg/L Na mg/L Mg mg/LSiO2 mg/L P
NO. OF L-FLAGGED VALUES 0 0 0 0 3
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 2 5 8 1 3
MEAN 422. 14. 9. 20.00 0.018
MINIMUM 14. 3. 0.010
DATE OF MINIMUM 1986-03-29 1987-11-27 1986-03-29
10TH PERCENTILE
MEDIAN 14. 10. 0.010
90TH PERCENTILE
MAXIMUM 15. 15. 0.040
DATE OF MAXIMUM 1987-02-22 1985-11-09 1987-10-10
STANDARD DEVIATION 0. 4. 0.013
SULPHATE Cl K Ca Mn
DISS DISS DISS TOTAL
16302 17201 19103 20101 25004
mg/L SO4 mg/L Cl mg/L K mg/L Ca mg/L Mn
NO. OF L-FLAGGED VALUES 5 0 0 0 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 3 8 5 8 6
MEAN 1. 11. 7.0 14.650 0.69
MINIMUM 0. 8. 4.5 2.200 0.10
DATE OF MINIMUM 1987-10-10 1986-10-22 1986-03-29 1987-02-22 1987-10-10
10TH PERCENTILE
MEDIAN 1. 10. 7.0 11.800 0.69
90TH PERCENTILE
MAXIMUM 3. 15. 10.0 31.000 1.12
DATE OF MAXIMUM 1985-06-01 1985-11-09 1985-06-01 1987-11-27 1987-02-22
STANDARD DEVIATION 1. 2. 2.5 9.314 0.42
Fe Fe INST
TOTAL TOTAL DISCHG
26004 26005 97160
mg/L Fe mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 1 0 0
NO. OF G-FLAGGED VALUES 0 0 0
NO. OF UNFLAGGED VALUES 5 1 6
MEAN 8.92 4.30 163.3
MINIMUM 0.10 31.8
DATE OF MINIMUM 1987-10-10 1986-10-22
10TH PERCENTILE
MEDIAN 3.20 146.0
90TH PERCENTILE
MAXIMUM 24.00 312.8
DATE OF MAXIMUM 1986-10-22 1986-03-29
STANDARD DEVIATION 10.65 104.9
STATION - THIKA RIVER STATION NO. 112005
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 00/47/50 LONG. 037/15/45 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-07-19 TO 1987-12-03
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N O2
COND DISS
02041 02062 07207 07306 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 1 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 12 13 8 7 5
MEAN 157. 21.1 0.06 0.63 8.5
MINIMUM 64. 18.0 0.01 0.03 6.9
DATE OF MINIMUM 1986-06-09 1986-06-09 1986-06-09 1986-06-09 1987-04-15
10TH PERCENTILE 70. 18.3
MEDIAN 160. 21.5 0.04 0.40 8.8
90TH PERCENTILE 220. 22.4
MAXIMUM 247. 23.0 0.20 1.64 10.6
DATE OF MAXIMUM 1987-09-29 1987-04-15 1987-02-03 1986-10-13 1986-09-11
STANDARD DEVIATION 53. 1.4 0.06 0.58 1.4
BOD COD F ALK pH
DISS TOTAL
08201 08301 09105 10101 10302
mg/L O2 mg/L O2 mg/L F mg/L pH UNITS
NO. OF L-FLAGGED VALUES 3 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 3 6 12 12 12
MEAN 3. 17. 0.3 51.83 7.1
MINIMUM 1. 8. 0.2 26.00 6.2
DATE OF MINIMUM 1986-04-21 1986-10-13 1985-10-30 1986-06-09 1986-06-09
10TH PERCENTILE 0.2 26.00 6.2
MEDIAN 3. 20. 0.3 40.00 7.1
90TH PERCENTILE 0.4 61.00 7.5
MAXIMUM 5. 22. 0.7 186.00 8.1
DATE OF MAXIMUM 1987-02-03 1987-04-15 1986-04-21 1986-09-11 1985-07-19
STANDARD DEVIATION 2. 6. 0.1 43.77 0.5
SUSP SOL Na Mg Si P ORTHO
105 DEG DISS DISS REACTIVE TOTAL
10401 11105 12103 14101 15205
mg/L mg/L Na mg/L Mg mg/LSiO2 mg/L P
NO. OF L-FLAGGED VALUES 0 0 0 0 3
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 1 8 11 2 8
MEAN 4. 21. 4. 13.25 0.043
MINIMUM 7. 1. 0.010
DATE OF MINIMUM 1986-06-09 1986-06-09 1985-07-19
10TH PERCENTILE 1. 0.010
MEDIAN 23. 3. 0.010
90TH PERCENTILE 4. 0.093
MAXIMUM 34. 11. 0.240
DATE OF MAXIMUM 1985-07-19 1985-10-30 1987-02-03
STANDARD DEVIATION 9. 3. 0.071
SULPHATE Cl K Ca Cr
DISS DISS DISS TOTAL
16302 17201 19103 20101 24002
mg/L SO4 mg/L Cl mg/L K mg/L Ca mg/L Cr
NO. OF L-FLAGGED VALUES 0 0 0 0 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 10 12 5 11 0
MEAN 11. 12. 2.6 6.455 0.100
MINIMUM 0. 7. 1.1 0.200
DATE OF MINIMUM 1987-05-20 1985-10-30 1986-06-09 1986-06-09
10TH PERCENTILE 0. 7. 0.430
MEDIAN 9. 12. 3.0 4.900
90TH PERCENTILE 17. 17. 12.550
MAXIMUM 38. 18. 3.6 16.000
DATE OF MAXIMUM 1987-09-29 1987-09-29 1987-04-15 1987-11-27
STANDARD DEVIATION 11. 3. 0.9 4.628
Mn Fe Cu Zn Cd
TOTAL TOTAL TOTAL TOTAL TOTAL
25004 26004 29006 30004 48001
mg/L Mn mg/L Fe mg/L Cu mg/L Zn mg/L Cd
NO. OF L-FLAGGED VALUES 0 1 1 0 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 9 8 1 1 0
MEAN 0.14 1.34 0.100 0.100 0.100
MINIMUM 0.01 0.01
DATE OF MINIMUM 1985-10-30 1987-05-20
10TH PERCENTILE
MEDIAN 0.13 0.70
90TH PERCENTILE
MAXIMUM 0.28 5.20
DATE OF MAXIMUM 1986-06-09 1986-06-09
STANDARD DEVIATION 0.09 1.67
Pb INST
TOTAL DISCHG
82001 97160
mg/L Pb m3/S
NO. OF L-FLAGGED VALUES 1 0
NO. OF G-FLAGGED VALUES 0 0
NO. OF UNFLAGGED VALUES 0 10
MEAN 0.100 4.6
MINIMUM 1.4
DATE OF MINIMUM 1987-01-30
10TH PERCENTILE 1.4
MEDIAN 1.7
90TH PERCENTILE 3.9
MAXIMUM 29.3
DATE OF MAXIMUM 1987-05-20
STANDARD DEVIATION 8.7
STATION - NAIROBI RIVER STATION NO. 112006
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 01/10/40 LONG. 037/07/10 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-03-28 TO 1987-11-30
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP TEMP NO2-N NO3-N
COND
02041 02061 02062 07207 07306
us/cm deg C 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 14 1 11 6 9
MEAN 596. 21.0 21.5 0.03 0.12
MINIMUM 300. 18.0 0.01 0.01
DATE OF MINIMUM 1986-06-12 1985-07-19 1986-06-12 1986-04-22
10TH PERCENTILE 308. 18.2
MEDIAN 520. 22.0 0.01 0.04
90TH PERCENTILE 940. 23.0
MAXIMUM 1150. 23.0 0.09 0.41
DATE OF MAXIMUM 1986-03-03 1986-04-22 1986-10-15 1986-09-15
STANDARD DEVIATION 261. 1.6 0.03 0.14
O2 BOD COD F F
DISS DISS DISS
08102 08201 08301 09104 09105
mg/L O2 mg/L O2 mg/L O2 mg/L F mg/L F
NO. OF L-FLAGGED VALUES 0 1 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 5 8 10 1 13
MEAN 3.8 29. 97. 1.0 1.1
MINIMUM 1.2 5. 15. 0.5
DATE OF MINIMUM 1987-04-15 1986-06-12 1986-06-12 1985-11-01
10TH PERCENTILE 15. 0.5
MEDIAN 2.3 30. 98. 1.1
90TH PERCENTILE 150. 1.5
MAXIMUM 8.6 45. 180. 1.5
DATE OF MAXIMUM 1987-11-30 1986-04-22 1986-10-15 1986-04-22
STANDARD DEVIATION 3.1 14. 50. 0.3
ALK ALK pH SUSP SOL Na
TOTAL TOTAL 105 DEG DISS
10101 10102 10302 10401 11105
mg/L mg/L pH UNITS mg/L mg/L Na
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 1 14 3 8
MEAN 174.62 146.00 7.5 51. 59.
MINIMUM 66.00 6.5 3.
DATE OF MINIMUM 1985-07-19 1986-06-12 1985-07-19
10TH PERCENTILE 69.00 6.6
MEDIAN 192.00 7.6 66.
90TH PERCENTILE 254.80 8.0
MAXIMUM 372.00 8.0 140.
DATE OF MAXIMUM 1986-09-15 1986-04-22 1985-03-28
STANDARD DEVIATION 87.69 0.5 43.
Mg Si P ORTHO SULPHATE SULPHATE
DISS REACTIVE TOTAL
12103 14101 15205 16302 16306
mg/L Mg mg/LSiO2 mg/L P mg/L SO4 mg/L SO4
NO. OF L-FLAGGED VALUES 0 0 1 1 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 9 2 8 7 1
MEAN 7. 9.50 0.744 11. 3.
MINIMUM 4. 0.010 0.
DATE OF MINIMUM 1986-06-12 1985-11-01 1986-06-12
10TH PERCENTILE
MEDIAN 6. 0.200 10.
90TH PERCENTILE
MAXIMUM 22. 2.200 27.
DATE OF MAXIMUM 1985-11-01 1986-09-15 1987-04-15
STANDARD DEVIATION 6. 0.893 8.
Cl K Ca Cr Mn
DISS DISS DISS TOTAL TOTAL
17201 19103 20101 24002 25004
mg/L Cl mg/L K mg/L Ca mg/L Cr mg/L Mn
NO. OF L-FLAGGED VALUES 0 0 0 1 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 14 6 9 0 8
MEAN 44. 36.7 7.033 0.100 0.90
MINIMUM 16. 9.4 0.100 0.04
DATE OF MINIMUM 1986-06-12 1986-06-12 1985-11-01 1986-09-15
10TH PERCENTILE 19.
MEDIAN 48. 18.0 7.300 0.92
90TH PERCENTILE 58.
MAXIMUM 61. 134.0 18.000 2.50
DATE OF MAXIMUM 1986-03-03 1985-07-19 1987-11-30 1987-04-15
STANDARD DEVIATION 13. 48.1 5.406 0.82
Fe Cu Zn Cd Pb
TOTAL TOTAL TOTAL TOTAL TOTAL
26004 29006 30004 48001 82001
mg/L Fe mg/L Cu mg/L Zn mg/L Cd mg/L Pb
NO. OF L-FLAGGED VALUES 0 1 0 1 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 7 0 1 0 0
MEAN 3.66 0.100 0.200 0.100 0.100
MINIMUM 0.60
DATE OF MINIMUM 1986-09-15
10TH PERCENTILE
MEDIAN 3.40
90TH PERCENTILE
MAXIMUM 7.60
DATE OF MAXIMUM 1986-06-12
STANDARD DEVIATION 2.36
STATION - ONDIRI SWAMP STATION NO. 112007
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 01/16/00 LONG. 036/37/30 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE GROUNDWATER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-07-20 TO 1987-04-16
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N O2
COND DISS
02041 02062 07207 07306 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 7 2 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 13 13 4 9 4
MEAN 215. 19.6 0.01 0.42 3.9
MINIMUM 150. 17.0 0.01 0.04 3.2
DATE OF MINIMUM 1986-08-04 1986-05-23 1986-02-28 1986-04-28 1986-10-13
10TH PERCENTILE 161. 17.3 0.01 0.04
MEDIAN 220. 20.0 0.01 0.06 4.0
90TH PERCENTILE 244. 20.7 0.01 1.19
MAXIMUM 250. 22.0 0.01 1.30 4.5
DATE OF MAXIMUM 1985-07-20 1987-03-11 1987-04-16 1987-03-11 1986-08-04
STANDARD DEVIATION 28. 1.3 0.00 0.53 0.5
BOD COD F ALK pH
DISS TOTAL
08201 08301 09105 10101 10302
mg/L O2 mg/L O2 mg/L F mg/L pH UNITS
NO. OF L-FLAGGED VALUES 1 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 2 4 13 13 13
MEAN 5. 21. 0.5 38.46 6.3
MINIMUM 4. 0.2 28.00 5.0
DATE OF MINIMUM 1986-10-13 1985-10-28 1986-05-23 1986-08-04
10TH PERCENTILE 0.2 30.40 5.2
MEDIAN 20. 0.4 40.00 6.5
90TH PERCENTILE 1.2 41.40 6.9
MAXIMUM 40. 1.7 44.00 8.0
DATE OF MAXIMUM 1987-04-16 1986-10-13 1987-04-16 1985-07-20
STANDARD DEVIATION 15. 0.5 3.82 0.8
SUSP SOL Na Mg Si P ORTHO
105 DEG DISS DISS REACTIVE TOTAL
10401 11105 12103 14101 15205
mg/L mg/L Na mg/L Mg mg/LSiO2 mg/L P
NO. OF L-FLAGGED VALUES 1 0 0 0 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 1 12 12 7 12
MEAN 4. 23. 2. 38.67 0.014
MINIMUM 16. 1. 23.70 0.010
DATE OF MINIMUM 1986-08-04 1986-06-13 1987-03-11 1985-07-20
10TH PERCENTILE 16. 1. 0.010
MEDIAN 20. 2. 40.00 0.010
90TH PERCENTILE 24. 2. 0.020
MAXIMUM 62. 4. 50.00 0.030
DATE OF MAXIMUM 1985-07-20 1985-07-20 1986-06-13 1986-08-04
STANDARD DEVIATION 12. 1. 7.96 0.007
SULPHATE Cl K Ca Mn
DISS DISS DISS TOTAL
16302 17201 19103 20101 25004
mg/L SO4 mg/L Cl mg/L K mg/L Ca mg/L Mn
NO. OF L-FLAGGED VALUES 0 0 0 0 5
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 11 13 10 12 7
MEAN 4. 33. 7.5 3.117 0.03
MINIMUM 1. 28. 5.7 1.300 0.01
DATE OF MINIMUM 1987-02-03 1986-06-13 1987-03-11 1986-06-13 1986-04-28
10TH PERCENTILE 1. 28. 5.7 1.380 0.01
MEDIAN 2. 29. 7.1 2.300 0.01
90TH PERCENTILE 3. 44. 9.5 5.240 0.10
MAXIMUM 30. 48. 11.0 10.000 0.10
DATE OF MAXIMUM 1985-07-20 1985-07-20 1986-04-28 1985-07-20 1986-02-28
STANDARD DEVIATION 8. 7. 1.7 2.514 0.04
Fe INST
TOTAL DISCHG
26004 97160
mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 2 0
NO. OF G-FLAGGED VALUES 0 0
NO. OF UNFLAGGED VALUES 10 13
MEAN 0.19 0.0
MINIMUM 0.10 0.0
DATE OF MINIMUM 1985-07-20 1985-07-20
10TH PERCENTILE 0.10 0.0
MEDIAN 0.10 0.0
90TH PERCENTILE 0.41 0.0
MAXIMUM 0.60 0.0
DATE OF MAXIMUM 1986-10-13 1987-04-16
STANDARD DEVIATION 0.17 0.0
STATION - LAKE VICTORIA,KISUMU STATION NO. 112008
COUNTRY - KENYA DEPTH(M) 5.0
LOCATION - OCT. 8 LAT. 00/15/29 LONG. 034/35/29 ELEVATION(M)1136.0
REGIONAL CENTRE - AFRA WATER TYPE LAKE
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-07-11 TO 1987-08-25
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N NH3
COND
02041 02062 07207 07306 07555
us/cm deg C mg/L N mg/L N mg/L N
NO. OF L-FLAGGED VALUES 0 0 0 2 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 6 2 6 4 2
MEAN 72. 23.5 0.01 0.90 0.16
MINIMUM 14. 0.01 0.01
DATE OF MINIMUM 1985-07-11 1985-07-11 1986-03-27
10TH PERCENTILE
MEDIAN 53. 0.01 0.95
90TH PERCENTILE
MAXIMUM 160. 0.03 2.00
DATE OF MAXIMUM 1986-03-27 1987-08-25 1985-07-11
STANDARD DEVIATION 67. 0.01 0.80
F ALK ALK pH Na
DISS TOTAL TOTAL DISS
09105 10101 10102 10302 11105
mg/L F mg/L mg/L pH UNITS mg/L Na
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 3 4 1 6 2
MEAN 0.7 45.20 74.00 8.2 18.
MINIMUM 6.80 7.8
DATE OF MINIMUM 1985-08-13 1987-08-25
10TH PERCENTILE
MEDIAN 54.00 8.2
90TH PERCENTILE
MAXIMUM 66.00 8.6
DATE OF MAXIMUM 1986-03-27 1985-08-13
STANDARD DEVIATION 27.99 0.3
Mg Si P ORTHO P SULPHATE
DISS REACTIVE TOTAL TOTAL
12103 14101 15205 15405 16302
mg/L Mg mg/LSiO2 mg/L P mg/L P mg/L SO4
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 2 2 6 1 4
MEAN 3. 11.00 0.263 0.020 4.
MINIMUM 0.020 2.
DATE OF MINIMUM 1986-03-27 1986-03-27
10TH PERCENTILE
MEDIAN 0.310 3.
90TH PERCENTILE
MAXIMUM 0.570 8.
DATE OF MAXIMUM 1985-08-13 1985-08-13
STANDARD DEVIATION 0.212 3.
Cl K Ca Mn Mn
DISS DISS DISS TOTAL DISS
17201 19103 20101 25004 25104
mg/L Cl mg/L K mg/L Ca mg/L Mn mg/L Mn
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 6 3 2 2 2
MEAN 6. 4.1 3.100 0.09 0.19
MINIMUM 1.
DATE OF MINIMUM 1987-08-25
10TH PERCENTILE
MEDIAN 6.
90TH PERCENTILE
MAXIMUM 9.
DATE OF MAXIMUM 1986-03-27
STANDARD DEVIATION 3.
Fe Fe INST
TOTAL DISS DISCHG
26004 26104 97160
mg/L Fe mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0
NO. OF UNFLAGGED VALUES 2 2 1
MEAN 0.34 0.33 11.9
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
STATION - SIO RIVER STATION NO. 112009
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 3 LAT. 00/21/17 LONG. 034/10/58 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-06-11 TO 1987-10-04
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC NO2-N NO3-N NH3 O2
COND DISS
02041 07207 07306 07555 08102
us/cm mg/L N mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 1 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 4 1 2 2 1
MEAN 109. 0.01 1.11 0.36 6.8
MINIMUM 95.
DATE OF MINIMUM 1985-08-08
10TH PERCENTILE
MEDIAN 108.
90TH PERCENTILE
MAXIMUM 124.
DATE OF MAXIMUM 1987-10-04
STANDARD DEVIATION 12.
F F ALK ALK pH
DISS DISS TOTAL TOTAL
09104 09105 10101 10102 10302
mg/L F mg/L F mg/L 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 1 1 3 1 4
MEAN 0.2 0.7 36.00 36.00 7.0
MINIMUM 6.4
DATE OF MINIMUM 1987-10-04
10TH PERCENTILE
MEDIAN 7.1
90TH PERCENTILE
MAXIMUM 7.5
DATE OF MAXIMUM 1985-08-08
STANDARD DEVIATION 0.5
Na Na Mg P ORTHO SULPHATE
DISS DISS DISS TOTAL
11103 11105 12103 15205 16302
mg/L Na mg/L Na mg/L Mg mg/L P mg/L SO4
NO. OF L-FLAGGED VALUES 0 0 0 0 1
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 1 1 2 2 1
MEAN 7. 29. 4. 0.215 5.
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
SULPHATE Cl K Ca Mn
DISS DISS DISS TOTAL
16306 17201 19103 20101 25004
mg/L SO4 mg/L Cl mg/L K mg/L Ca mg/L Mn
NO. OF L-FLAGGED VALUES 1 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 0 4 1 2 2
MEAN 0. 3. 1.1 2.700 0.13
MINIMUM 0.
DATE OF MINIMUM 1985-08-20
10TH PERCENTILE
MEDIAN 3.
90TH PERCENTILE
MAXIMUM 7.
DATE OF MAXIMUM 1985-06-11
STANDARD DEVIATION 3.
Mn Fe Fe Fe
DISS TOTAL TOTAL DISS
25104 26002 26004 26104
mg/L Mn mg/L Fe mg/L Fe mg/L Fe
NO. OF L-FLAGGED VALUES 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0
NO. OF UNFLAGGED VALUES 2 1 1 2
MEAN 0.22 9.00 1.40 3.45
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
STATION - NZOIA RIVER STATION NO. 112010
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 3 LAT. 00/14/12 LONG. 034/22/35 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-06-11 TO 1985-08-21
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO3-N NH3 O2
COND DISS
02041 02062 07306 07555 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 2 1 1 1 1
MEAN 111. 22.0 2.40 0.52 7.4
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
F ALK pH Na Mg
DISS TOTAL DISS DISS
09105 10101 10302 11105 12103
mg/L F mg/L pH UNITS mg/L Na mg/L Mg
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 1 2 2 1 1
MEAN 0.7 47.50 7.1 30. 4.
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
SULPHATE Cl K Ca Mn
DISS DISS DISS TOTAL
16302 17201 19103 20101 25004
mg/L SO4 mg/L Cl mg/L K mg/L Ca mg/L Mn
NO. OF L-FLAGGED VALUES 1 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 0 2 1 1 2
MEAN 0. 4. 1.2 4.000 0.26
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
Fe INST
TOTAL DISCHG
26004 97160
mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 0 0
NO. OF G-FLAGGED VALUES 0 0
NO. OF UNFLAGGED VALUES 2 1
MEAN 4.95 65.5
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
STATION - GUCHA MIGORI RIVER STATION NO. 112011
COUNTRY - KENYA DEPTH(M) 9999.9
LOCATION - OCT. 8 LAT. 01/00/10 LONG. 034/14/59 ELEVATION(M)9999.9
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1985-01-01 TO 1987-12-31
PERIOD OF RECORD FROM - 1985-05-29 TO 1987-10-01
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
ELEC TEMP NO2-N NO3-N O2
COND DISS
02041 02062 07207 07306 08102
us/cm deg C mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 5 1 3 3 3
MEAN 86. 23.0 0.10 3.83 7.4
MINIMUM 70.
DATE OF MINIMUM 1987-10-01
10TH PERCENTILE
MEDIAN 86.
90TH PERCENTILE
MAXIMUM 100.
DATE OF MAXIMUM 1987-02-10
STANDARD DEVIATION 12.
F ALK ALK pH P ORTHO
DISS TOTAL TOTAL TOTAL
09105 10101 10102 10302 15205
mg/L F mg/L mg/L pH UNITS 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 2 4 1 4 3
MEAN 0.3 57.25 38.00 7.1 0.357
MINIMUM 39.00 6.9
DATE OF MINIMUM 1985-08-29 1987-05-09
10TH PERCENTILE
MEDIAN 44.00 7.1
90TH PERCENTILE
MAXIMUM 102.00 7.4
DATE OF MAXIMUM 1985-05-29 1987-02-10
STANDARD DEVIATION 29.97 0.2
Cl Mn Fe INST
DISS TOTAL TOTAL DISCHG
17201 25004 26004 97160
mg/L Cl mg/L Mn mg/L Fe m3/S
NO. OF L-FLAGGED VALUES 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0
NO. OF UNFLAGGED VALUES 3 2 2 2
MEAN 4. 0.20 0.11 113.3
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
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