CSIR Water Research Institute – Results Of Water Quality Analysis of Volta Lake For The Year 2000 And 2003

Below are the results of water quality analysis of the Volta Lake from CSIR Water Research Institute for the year 2000 and 2003.

		Up-Stream of Cages	In-Between Cages	Down-Stream of Cages
Parameter	Units	Surface	Middle	Bottom	Surface	Middle	Bottom	Surface	Middle	Bottom
Temperature	oC	29.3	28.7	28.4	29	28.5	28.3	29	28.7	28.5
pH	pH Units	7.4	7.8	7.3	7.6	7.4	7.4	7.9	7.6	8.2
Conductivity	uS/cm	58.9	59.8	60.3	59.8	63.7	46.5	60.5	60.1	65.4
Total Dissolved Solids	mg/l	29.3	29.8	30.1	29.8	31.8	23.3	30.2	30	32.6
Turbidity	NTU	2	2	3	2	3	1	3	3	3
Ammonium	mg/l	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Phosphate	mg/l	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Nitrite	mg/l	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Total Alkalinity	mg/l	31	31	31.5	31	32	31	39	32	31
Total Hardness	mg/l	24	24	30	28	27	27	34	26	25
Dissolved Oxygen	mg/l	8.2	7.9	7.3	8.1	7.5	7.7	8.2	7.7	7.5
BOD	mg/l	1.8	1.5	1.35	1.9	1.4	1.5	1.9	1.65	1.5

Remarks: Transparencies were 1.53 meters at all three sections of the river.

• All four cages are 5 meters below the river surface as such, the middle refers to that depth
• The bottom refers to about 8 meters below the surface.

Water quality monitoring for 2000 (before project inception)

Water Research Institute

ARDEC (CSIR)

PO BOX 139 AKOSOMBO

RESULTS OF WATER QUALITY ANALYSES

SOURCE RIVER VOLTA, ANUM BOSO REMARKS: CLOUDY SKIES, DATE 17/6/2000

		Sample Value
Parameter	Units	Dodi Asantekrom, GWCL Intake Point (Surface)	Jerusalem   (Surface)
Temperature	0C	29.2	29.8
pH	pH Units	7.2	7.2
Transparency	M	1.67	1.79
Turbidity	NTU	5	4
Conductivity	µS/cm	57.7	58.7
Total Dissolved Solids	mg/l	28.8	29.3
Ammonia (NH3-N)	mg/l	0.03	0.10
Phosphate (PO4-P)	mg/l	0.01	0.10
Nitrite (NO2-N)	mg/l	0.008	0.012
Nitrate (NO3-N)	mg/l	0.01	0.02
Total Alkalinity (as CaCO3)	mg/l	30.0	30.0
Total Hardness (as CaCO3)	mg/l	27.5	34.0
Dissolved Oxygen (DO)	mg/l	7.2	7.3
Biochemical Oxygen Demand (BOD)	mg/l	1.0	1.5

		Sample Value
Parameter	Units	Dodi Asantekrom, GWCL Intake Point (Bottom)	Jerusalem 20m offshore (Bottom)
Temperature	0C	–	–
Transparency	M
Turbidity	NTU	12	11
Conductivity	µS/cm	78.7	74.1
Total Dissolved Solids	mg/l	39.4	37.0
Ammonia (NH3-N)	mg/l	0.06	0.08
Phosphate (PO4-P)	mg/l	0.01	0.01
Nitrite (NO2-N)	mg/l	0.007	0.07
Nitrate (NO3-N)	mg/l	0.02	0.01
Total Alkalinity (as CaCO3)	mg/l	31.5	31.5
Total Hardness (as CaCO3)	mg/l	30.0	36.0
Dissolved Oxygen (DO)	mg/l	7.3	7.5
Biochemical Oxygen Demand (BOD)	mg/l	–	–

Source: Crystal Lake Fish Limited