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Savanna Journal of Basic and Applied Sciences 1(2):261-268
Heavy Metal and Microbial Contents of Borehole Water in Birnin Kebbi and Kalgo Metropolis, Kebbi State, Nigeria
Shemishere, U. B., Yahaya, T. O., Anyebe, A. D., Abdurazaq, A. N., and Bello A1. 1

ABSTRACT
This study was aimed at determining the heavy metal content and microbial loads of pipe borne water in Birnin Kebbi and Kalgo metropolis. Water was collected in sterilized sample bottles from public and private boreholes from different locations in Birnin Kebbi and Kalgo metropolis. The water samples were analyzed for the presence of selected heavy metals via Atomic Absorption Spectroscopy while standard procedures were used for the bacterial, coliform and yeast count. The results show that concentration of Lead was found to be above WHO limit (Pb ≤ 0.01 ppm), higher than the WHO limit for Iron (Fe ≤ 0.03 ppm) in all but those from Gwadangwaji and Tudun Wada areas of Birnin Kebbi and Illela yari area of Kalgo. Cadmium, which was only detected in samples from Illela yari and Ungwar jeji area of Kalgo metropolis higher than the WHO limits (Cd ≤ 0.003). Nickel was also detected in high concentration in some of the water samples while Copper and Chromium were within the WHO limit (Cu ≤ 1.0, Cr ≤ 0.003) in all the water samples. In the coliform detection test, all the samples revealed normal levels of coliform. Yeast was recorded above the normal range only in Haliru Abdu area of Birnin Kebbi whereas other samples were within the WHO limits. From the results of this study, it is concluded that the pipe-borne water supply from the majority of the sampled areas were contaminated with some heavy metals and Bacteria. It is therefore advised that, water from borehole need to be treated further before consumption in order to get rid of contaminants. Neglecting this might pose a significant public health risk.