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STATISTICS FOR GHANA
GEMS/WATER - STATISTICAL SUMMARY BY STATION 2002-01-30 PAGE 108
STATION - WEIJA LAKE ON DENSU RIVER STATION NO. 081001
COUNTRY - GHANA DEPTH(M) 10.5
LOCATION - OCT. 0 LAT. 05/33/33 LONG. 000/21/16 ELEVATION(M) 14.3
REGIONAL CENTRE - AFRA WATER TYPE LAKE
PERIOD REQUESTED FROM - 1994-01-01 TO 1996-12-31
PERIOD OF RECORD FROM - 1994-01-31 TO 1995-11-17
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
TEMP NO3NO2 NH3 O2 BOD
DISS
02061 07105 07555 08101 08201
deg C mg/L N mg/L N 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 6 11 12 8 8
MEAN 30.5 2.07 0.19 8.1 6.
MINIMUM 26.5 0.00 0.00 5.1 2.
DATE OF MINIMUM 1994-07-30 1994-05-30 1994-06-29 1995-05-25 1995-07-27
10TH PERCENTILE 0.00 0.00
MEDIAN 30.9 1.40 0.15 7.5 6.
90TH PERCENTILE 4.86 0.45
MAXIMUM 32.5 5.00 0.55 13.0 9.
DATE OF MAXIMUM 1994-04-27 1994-04-27 1994-05-30 1994-09-29 1994-09-29
STANDARD DEVIATION 2.1 2.00 0.19 2.7 2.
ALK pH Mg Si SULPHATE
TOTAL DISS REACTIVE
10102 10301 12103 14101 16302
mg/L pH UNITS mg/L Mg mg/LSiO2 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 15 15 13 3 10
MEAN 114.60 7.6 12. 0.53 14.
MINIMUM 91.00 6.2 5. 0.
DATE OF MINIMUM 1994-06-29 1994-11-25 1995-09-27 1994-05-30
10TH PERCENTILE 91.50 6.6 6. 0.
MEDIAN 105.00 7.8 12. 16.
90TH PERCENTILE 147.00 8.3 15. 21.
MAXIMUM 180.00 8.3 16. 22.
DATE OF MAXIMUM 1995-03-22 1994-03-28 1995-01-26 1994-09-29
STANDARD DEVIATION 26.34 0.6 3. 7.
Cl Ca Mn Fe Fe
DISS DISS DISS TOTAL DISS
17204 20101 25104 26004 26104
mg/L Cl mg/L Ca mg/L Mn mg/L Fe mg/L Fe
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 14 13 2 3 3
MEAN 43. 16.400 0.00 0.16 0.28
MINIMUM 34. 12.000
DATE OF MINIMUM 1994-01-31 1994-01-31
10TH PERCENTILE 34. 12.000
MEDIAN 39. 16.800
90TH PERCENTILE 50. 21.440
MAXIMUM 74. 23.200
DATE OF MAXIMUM 1995-03-22 1995-07-27
STANDARD DEVIATION 11. 3.518
STATION - PRA RIVER AT DABOASE STATION NO. 081002
COUNTRY - GHANA DEPTH(M) 3.6
LOCATION - OCT. 0 LAT. 05/06/36 LONG. 001/39/48 ELEVATION(M) 3.3
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1994-01-01 TO 1996-12-31
PERIOD OF RECORD FROM - 1994-01-31 TO 1994-12-28
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
TEMP NO3NO2 ALK pH Mg
TOTAL DISS
02061 07105 10102 10300 12103
deg C mg/L N mg/L pH UNITS 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 12 1 12 12 11
MEAN 25.8 3.00 53.75 7.1 1.
MINIMUM 21.7 30.00 6.7 0.
DATE OF MINIMUM 1994-01-31 1994-05-30 1994-03-31 1994-04-29
10TH PERCENTILE 22.0 32.00 6.7 0.
MEDIAN 26.2 50.00 7.1 1.
90TH PERCENTILE 27.9 68.50 7.3 2.
MAXIMUM 28.3 90.00 7.3 4.
DATE OF MAXIMUM 1994-05-30 1994-06-29 1994-06-29 1994-08-30
STANDARD DEVIATION 2.0 15.69 0.3 1.
Si Cl Ca Fe COLIFORM
REACTIVE DISS DISS TOTAL TOTAL
14101 17204 20101 26002 36001
mg/LSiO2 mg/L Cl mg/L Ca mg/L Fe No/100ml
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 6
NO. OF UNFLAGGED VALUES 1 11 12 10 0
MEAN 0.50 15. 12.892 2.44 18.
MINIMUM 5. 1.100 1.20 18.
DATE OF MINIMUM 1994-08-30 1994-09-29 1994-04-29 1994-01-31
10TH PERCENTILE 5. 2.560 1.20
MEDIAN 13. 13.200 2.50 18.
90TH PERCENTILE 24. 17.640 3.50
MAXIMUM 46. 20.800 3.60 18.
DATE OF MAXIMUM 1994-04-29 1994-03-31 1994-01-31 1994-07-29
STANDARD DEVIATION 12. 5.228 0.94 0.
STATION - NAWUNI ON WHITE VOLTA RIVER STATION NO. 081003
COUNTRY - GHANA DEPTH(M) 2.8
LOCATION - OCT. 0 LAT. 09/41/21 LONG. 001/04/52 ELEVATION(M) 95.5
REGIONAL CENTRE - AFRA WATER TYPE RIVER
PERIOD REQUESTED FROM - 1994-01-01 TO 1996-12-31
PERIOD OF RECORD FROM - 1994-01-31 TO 1995-12-07
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
TEMP NO3NO2 NH3 O2 BOD
DISS
02061 07105 07555 08101 08201
deg C mg/L N mg/L N 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 17 17 4 1 1
MEAN 29.5 0.69 0.63 7.2 3.
MINIMUM 25.5 0.01 0.03
DATE OF MINIMUM 1995-01-30 1994-04-28 1994-06-30
10TH PERCENTILE 25.6 0.02
MEDIAN 29.5 0.23 0.18
90TH PERCENTILE 32.2 1.00
MAXIMUM 33.1 6.39 2.13
DATE OF MAXIMUM 1994-03-29 1994-10-26 1995-07-19
STANDARD DEVIATION 2.3 1.51 1.00
ALK pH SUSP SOL Mg Si
TOTAL 105 DEG DISS REACTIVE
10102 10301 10401 12103 14101
mg/L pH UNITS mg/L 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 18 19 15 18 16
MEAN 41.50 7.0 185. 3. 3.53
MINIMUM 25.00 5.5 25. 0. 0.20
DATE OF MINIMUM 1995-03-27 1995-02-20 1995-12-07 1994-01-31 1994-04-28
10TH PERCENTILE 26.60 6.0 30. 0. 0.38
MEDIAN 40.00 7.1 188. 2. 0.95
90TH PERCENTILE 54.40 7.6 292. 5. 11.48
MAXIMUM 79.00 8.1 350. 8. 21.90
DATE OF MAXIMUM 1994-05-31 1994-01-31 1994-09-17 1995-07-19 1995-07-19
STANDARD DEVIATION 13.60 0.7 100. 2. 6.10
SULPHATE Cl Ca Mn Fe
DISS DISS DISS DISS
16302 17204 20101 25104 26102
mg/L SO4 mg/L Cl mg/L Ca mg/L Mn mg/L Fe
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 15 6 17 15 9
MEAN 19. 10. 8.418 0.13 1.26
MINIMUM 1. 8. 3.200 0.01 0.02
DATE OF MINIMUM 1995-03-27 1995-12-07 1994-07-30 1994-05-31 1994-02-28
10TH PERCENTILE 2. 3.760 0.01
MEDIAN 18. 10. 7.600 0.08 1.43
90TH PERCENTILE 33. 13.040 0.24
MAXIMUM 68. 13. 16.000 0.73 3.50
DATE OF MAXIMUM 1995-07-19 1994-06-30 1994-11-28 1994-08-29 1994-10-26
STANDARD DEVIATION 17. 2. 3.496 0.18 1.12
COLIFORM FAEC COL
TOTAL
36001 36011
No/100ml No/100ml
NO. OF L-FLAGGED VALUES 0 0
NO. OF G-FLAGGED VALUES 13 6
NO. OF UNFLAGGED VALUES 0 0
MEAN 16. 16.
MINIMUM 16. 16.
DATE OF MINIMUM 1994-01-31 1994-01-31
10TH PERCENTILE 16.
MEDIAN 16. 16.
90TH PERCENTILE 16.
MAXIMUM 16. 16.
DATE OF MAXIMUM 1995-03-27 1994-09-17
STANDARD DEVIATION 0. 0.
STATION - KPONG RESERVOIR ON VOLTA RIVER STATION NO. 081004
COUNTRY - GHANA DEPTH(M) 0.0
LOCATION - OCT. 0 LAT. 06/10/22 LONG. 000/03/00 ELEVATION(M) 14.8
REGIONAL CENTRE - AFRA WATER TYPE LAKE
PERIOD REQUESTED FROM - 1994-01-01 TO 1996-12-31
PERIOD OF RECORD FROM - 1994-01-29 TO 1995-11-28
STATISTICS INCLUDE ALL FLAGGED DATA AS REPORTED
TEMP TRANS NO3NO2 NH3 O2
DISS
02061 02076 07105 07555 08101
deg C m mg/L N mg/L N mg/L O2
NO. OF L-FLAGGED VALUES 0 0 2 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 20 4 16 6 4
MEAN 28.3 247.5 0.15 0.10 5.2
MINIMUM 26.0 210.0 0.01 0.00 0.9
DATE OF MINIMUM 1994-04-05 1994-03-26 1995-04-24 1994-05-26 1994-02-24
10TH PERCENTILE 26.0 0.01
MEDIAN 28.0 240.0 0.04 0.05 6.1
90TH PERCENTILE 31.0 0.24
MAXIMUM 32.5 300.0 1.22 0.38 7.5
DATE OF MAXIMUM 1994-11-24 1994-01-29 1995-03-23 1995-03-23 1994-11-24
STANDARD DEVIATION 1.8 37.7 0.30 0.15 3.1
BOD ALK pH SUSP SOL Mg
TOTAL 105 DEG DISS
08201 10102 10301 10401 12103
mg/L O2 mg/L pH UNITS mg/L 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 5 23 23 5 20
MEAN 4. 38.00 7.0 5. 3.
MINIMUM 2. 16.00 5.9 0. 0.
DATE OF MINIMUM 1994-05-26 1995-06-27 1994-03-26 1994-07-29 1995-11-28
10TH PERCENTILE 17.90 6.4 0.
MEDIAN 4. 36.00 6.9 5. 2.
90TH PERCENTILE 51.20 7.3 5.
MAXIMUM 8. 62.00 8.5 8. 18.
DATE OF MAXIMUM 1994-07-29 1995-03-23 1994-05-26 1994-01-29 1994-01-29
STANDARD DEVIATION 2. 10.93 0.5 3. 4.
Si SULPHATE Cl Ca Fe
REACTIVE DISS DISS DISS
14101 16302 17204 20101 26104
mg/LSiO2 mg/L SO4 mg/L Cl mg/L Ca mg/L Fe
NO. OF L-FLAGGED VALUES 0 0 0 0 0
NO. OF G-FLAGGED VALUES 0 0 0 0 0
NO. OF UNFLAGGED VALUES 13 4 9 20 8
MEAN 9.23 2. 15. 7.340 0.17
MINIMUM 3.00 1. 2. 4.000 0.05
DATE OF MINIMUM 1995-05-30 1994-01-29 1995-02-24 1994-03-26 1994-10-29
10TH PERCENTILE 4.20 4.400
MEDIAN 7.00 1. 9. 5.600 0.18
90TH PERCENTILE 14.00 8.800
MAXIMUM 14.00 3. 48. 21.000 0.30
DATE OF MAXIMUM 1995-11-28 1994-09-28 1994-02-24 1995-02-24 1994-02-24
STANDARD DEVIATION 3.49 1. 14. 4.247 0.08
COLIFORM FAEC COL
TOTAL
36001 36011
No/100ml No/100ml
NO. OF L-FLAGGED VALUES 0 0
NO. OF G-FLAGGED VALUES 3 0
NO. OF UNFLAGGED VALUES 0 1
MEAN 53. 0.
MINIMUM
DATE OF MINIMUM
10TH PERCENTILE
MEDIAN
90TH PERCENTILE
MAXIMUM
DATE OF MAXIMUM
STANDARD DEVIATION
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