The indiscriminate discharge of sewage, industrial, and a variety of water from human activities progressively alters and pollutes reservoir water. Investigation of the physicochemical in the water of Binday dam showed a fluctuation of phosphate during the months of October, November, and December. Similarly, low temperature was recorded in the months of September and December and nitrite increased during the month of December which failed to meet the Class C waters. Dissolved Oxygen, pH, electrical conductivity, biochemical oxygen demand, and total dissolved solids meet the standard measurement. Significant differences in physicochemical parameters were recorded between upstream and downstream during the months of September, October, November, and December except for DO, BOD, and EC. Fish identifications are exclusively found in the upstream and downstream namely, Oreochromis niloticus, Channa striata, Clarias gariepinus, Yanica hyalosoma, Carangidae sp., Glossogobius sp., and Glossogobius circumspectus classified as native species, and Sarotherodon melatheron and Gambusia affinis classified as invasive species. Fish distribution revealed that Carangidae sp. only thrives in the upstream whereas Gambusia affinis are exclusively found in the downstream.
