EVALUATION OF GROUNDWATER QUALITY USING CONTAMINATION INDEX IN PARTS OF ALIMOSHO, LAGOS - NIGERIA

Abstract

15 groundwater water samples were collected around 3 landfill sites in Igando,Lagos-Nigeria. Sample were analyzed for 7 heavy metals including Iron, Copper, Cadmium, Manganese, Lead, Zinc and Chromium using standard method.The results show that the concentration of heavy metals ranged between nd-55.18 mg L1. Zinc recorded the highest mean concentration of 18.12 mg L1 followed by Manganese (2.89 mg L1) while Chromium recorded the lowest mean value of 0.02mg L1 in the study area. The computed contaminated index ranged between 15.4-432.06.The highest contamination value was recorded at location G5 followed by G2 while location G9 recorded the lowest contamination value in the study area.It was concluded that contamination level is high.Cadmium accounted for about 23.3% for the contamination of groundwater quality deterioration while Lead and Copper accounts for 19.3 and 8.8% respectively.The study recommended treatment, proper maintenance and compliance to the specification of lanfill according to the world standard.