Seasonal Impact of Ikeja Industrial Wastewaters on Water Quality of Proximate Iya Alaro River in Lagos, Nigeria

Abstract

This study determined the seasonal impacts of wastewaters from Ikeja industrial estates on the water quality of proximate Iya Alaro River being one of the longest rivers employed for irrigational and washing purposes in the estate. Wastewater samples from industrial estate were collected at the point of discharge of effluents into the streams and at spatial interval of 50 to 200 meters upstream and downstream of the discharge point over a two- year period (2005-2007) .The effluents were analysed for physico-chemical parameters using standard methods. At discharge point during dry and rainy seasons, the pH were acidic (5.51 ± 0.16 to 6.46 ± 1.27 and 6.13 ± 0.96 to 6.80 ± 1.04).Total Dissolved Solid and Electrical Conductivity levels showed significant difference (p