THE CHARACTERIZATION AND DETERMINATION OF THE WATER QUALITY INDEX OF SURFACE AND GROUNDWATER IN ABUJA METROPOLIS, FCT-NIGERIA.

Water Quality Index (WQI) from different sources in Abuja metropolis, FCT - Nigeria, for surface and groundwater reserves (Rivers, lakes, boreholes and wells) were determined by use of physicochemical properties. Standard methods for water and wastewater analysis proposed by American Public Health Association were used. The results of the WQI from different locations were found to vary from 32.70 - 36.20 (tap water), 31.20-38.50 (boreholes) and 38.56-48.50 (well water) all signify good water quality. Surface water (lakes and rivers) found in the study area gave WQI values of 55.45 (Jabi lake), 82.20 (Mpape River) and 84.40 (Durumi River), all signifying poor water quality. The thirteen physicochemical parameters used to compute WQI for tap and groundwater samples were found to be fit for human consumption, while all surface water samples would require further purification or treatment before they can be certified fit for human consumption.