Anthropogenic Point Sources and Levels of Nutrients to Winam Gulf: Kisumu City Point Sources of Nitrogenous and Phosphorus Nutrients to River Kisat, Nyalenda Wigwa Stream and Winam Gulf

Effluent containing nutrients of nitrogen and phosphorus discharged at industries and Wastewater Treatment Plants (WWTP) are usually swept off through surface runoff into River Kisat (RK) and Nyalenda Wigwa stream (NWS) and finally into the Winam Gulf of Lake Victoria leading to eutrophication. There is lack of information on the efficiency of the Lagoons in reducing the levels of nutrients and the contribution of industries towards pollution, therefore the current study was carried out in order to acquire knowledge that will be useful for management of water quality and related functions. The objective of the study was to determine efficiency of nutrient removal from municipal waste disposals by Kisat Wastewater Treatment Plant (KWWTP) and Nyalenda Waste Stabilization Ponds (NWSP) and the contribution of nutrient concentrations by some industries to River Kisat. Results indicate that the WWTP are not efficient in removing nutrients from wastewater and Industries contribute substantial amount of nutrients into aquatic environment. Establishment more efficient WWTP to be encouraged and more research to be done on other suspected anthropogenic point sources within Lake Victoria Basin.