Municipal solid waste disposal is a global concern, most especially in a developing nation like Nigeria where landfills are better categorized as open dumps, sited for convenience and usually involve the pitching of garbage into pre-existing holes. These open pits are located near residential housing, posing a threat to public health and the environment. Leachate, a high-strength wastewater, generated from the dumps poses a serious contamination risk to groundwater. This work was therefore done to assess the impacts of leachate percolation on groundwater quality and evaluate its toxicity...