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Evaluating the Levels of Heavy Metals in Auto-Mechanic Waste Disposal Sites Across Makurdi Metropolis

Tom Brown

This study aimed to evaluate the contamination of heavy metals in auto-mechanic dumpsites located in the Makurdi metropolis, specifically in Kanshio (K), Northbank (NB), and Wadata (W) areas. The heavy metal concentrations (Cd, Cu, Pb, and Zn) were determined using an atomic absorption spectrophotometer (PG990). The mean concentrations of these heavy metals were found to exceed their respective reference permissible levels in the soil, as defined by World Health Organization (WHO), United States Environmental Protection Agency (USEPA), Mean Shale Concentration (MSC), and World Surface Rock Average (WSRA) guidelines. This indicates a significant level of pollution in the area, possibly attributed to activities such as welding, lead battery repairs, and coatings. Geo-accumulation index, contamination factor, and pollution load index were employed to assess the extent of contamination