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The study investigates some physicochemical properties ( pH, conductivity, total dissolved solid alkalinity, chromium, cadmium, lead etc) of surface and underground water selected from different locations in iron mining zone of Kogi State, North Central Nigeria. The study was conducted in two seasons: rainy and dry seasons. The results of the analysis show no significant difference between the physicochemical properties in the rainy and dry season at  = 0.05 levels. The soil pH was found to be weakly acidic in the dry season and weakly alkaline in the rainy season. The electrical conductivity ranges from 180.0-714.2  -1 in the dry season and 181.0-718.2  -1 in the rainy season. Total dissolved solid ranges from 70.2-207.3 mgL -1 in the dry season and 75.3-207.9 mgL -1 in rainy season and alkalinity ranges from 89.6-416.0 in the dry season and 90.6-417.1 in the rainy season. The concentrations of heavy metals determined by APLHA 4 model Atomic Absorption Spectrophotometer for both dry and rainy seasons respectively are 0.10-2.10 mgL -1 and 0.01-1.92 mgL -1 Pb; 0.01-0.7 mgL -1 and 0.01-0.7 mgL -1 Cd ; 0.01-1.9 and 0.01-2.0 mgL -1 Cr ; 3.0-16.0 and 5.2-20.0mgL - 1 for Fe respectively. The water bodies sampled were found to contained significant amount of toxic metals

Physico-chemical and mineral analysis of some Surface and underground waters from iron mining zone of Kogi State, Nigeria.