ASSESSMENT OF SOME DOMESTIC WATER SOURCES IN IRAGBIJI, BORIPE LOCAL GOVERNMENT, NIGERIA FOR POTABILITY USING WATER QUALITY INDEX

Abstract

Good health status of any water system is pivotal to its usability. This work aimed at assessing four streams (Alagaso, Ayeriyi, Elere and Arapayagi) in Iragbiji, Boripe Local Government Area of Osun State for portability using National Sanitation Foundation Water Quality Index (NSF-WQI). To achieve this, water samples were collected from the streams during wet and dry seasons and analysed for eight (8) physicochemical and biological parameters (pH, NO3, Turbidity, PO4, DO, E. Coli, DO and BOD) using America Public Health Association method of analysis. WQI was then computed using the mean values of the results of the concentrations of the parameters. The results of the analysis showed that while pH, PO4, and NO3 were within the established limits others were above. There was no seasonal variation in water quality of the four streams as indicated by WQI as they are rated as bad in the two seasons except for Alagaso stream which was ranked as "bad" in the wet season are not suitable and as medium in the dry season. It was thus concluded the stream the stream are not suitable sources of water for human consumption