MU Aminu

Levels of Some heavy metals in Earthen Ponds and numerous Concrete Water Storage Reservoirs (CWSRs) in Bakolori Irrigation Project (BIP) were investigated from March 2019 to February 2020. Four sampling stations were randomly selected from each of the two water body types. Water samples were collected monthly from the eight sampling stations and taken to the laboratory for analysis of Cadmium (Cd), Chromium (Cr), Copper (Cu), Iron (Fe), Manganese (Mn), Lead (Pb) and Zinc (Zn). The data collected were arranged on the bases of two seasons (dry & wet) and five sub-seasons, namely: Early dry (Oct - Dec); mid dry (Jan & Feb); late dry (March - May); Early rainy (June & July) and flood period (Aug & Sept), and subjected to T test analysis using Minitab statistical package. Results were compared with the water quality standards for Human consumption, aquatic life and fish production. Results showed that the water bodies were partly polluted by Cadmium, Chromium and Lead, but reasonably safe with regards to Copper, Manganese, Iron and Zinc. The study recommends continuous assessment of the water bodies for heavy metals concentration and bioaccumulation studies on fishes cultured and/or captured from the two water bodies.

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