This research paper examines the effects of solid wastes, quality and its control on groundwater pollution in Ikirun (Maboreje and Okeafo areas) Osun state Nigeria. The study was born out of unregulated manner in which both domestic and industrial wastes are deposited on the streets, river courses, buried, burnt and discarded in refuse heaps. Solid waste commonly generated in Ikirun includes papers and polyethene, tin and metals, ashes and dust, texture and rags, aluminium and other minerals. The analysis of physical, chemical and biological of raw water at ten different locations in Ikirun close to dump areas shows these wastes produce leachates and gases when they are decomposed and are washed by percolating and infiltrating rain water into the groundwater. However, most of the water parameters tested fall within World Health Organisation (W.H.O) recommendations while few are not. Inspite of this, recommendations are made to remedy the situations which include encouraging analysis of raw water, enlightenment campaign, groundwater exploration in Ikirun should be intensified and the principle of resource management should be adhered to.
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