Physico-Chemical And Bacteriological Quality Of Weija And Kpong Dams.

  • E. K. Acquaah
  • D. Carboo
Keywords: Water quality, Dam, sampling, parameters, reservoir


In this work, eight months field study was carried out to ascertain how human activities affect the quality of water of two major reservoirs; Weija and Kpong in Ghana. Water sampling was done at the end of each month for eight months both in the dry and wet seasons. Sampling sites were reached by the aid of a canoe and samples picked 1m below the water surface. Four samples were taken for each parameter analysed and the average taken. The analysis carried out included physico-chemical and bacteriological analysis. The assessment of the quality of the water revealed that the level of some of the parameters such as phosphate (PO4) and turbidity were above the WHO recommended limits of 0.02mg/l and 5.0NTU respectively whiles some like the Cadmium (Cd) and lead (Pb) were most of the time, especially in the wet season fell below detection limits for both reservoirs. Generally the mean levels of the parameters for the Weija reservoir were higher than that of the Kpong reservoir and most of these parameters showed seasonal variation. The quality of the treated water was also ascertained. Feacal and total coliform parameters were found to be within the WHO accepted limit for drinking water except for the month of December that had 1 cfu/100ml and 5 cfu/100ml of feacal and total coliforms, respectively, at Kpong. February recorded a total coliform of 7cfu/100ml at both Kpong and Weija and in the month of May Weija had total and feacal coliforms of 5 cfu/100ml and 2 cfu/100ml, respectively. These and other high levels of some of the parameters were attributed to poor sanitation, improper farming methods such as excess use of fertilizers, improper fishing practices and discharge of domestic waste into the reservoirs