The research work was to determine the standard of heavy metals and some physicochemical parameters of borehole water in Uromi community, Edo state Nigeria.Six sample of borehole water were collected from six different communities. Threephysical and eight chemical parameters such as TDS, EC, PH , HCO3, Cl, SO4, Mg, Ca, Hardness, Na and K were analyzed respectively. Seven heavy metals viz., Zn, Pb, Cd, As, Fe, Co and Cr were analyzed using standard procedures of Atomic Absorption Spectroscopy (AAs). The analyzed sampleresults were compared with the World Health Organization (WHO) permissible limit. Among the analyzed samples, regarding to physicochemical parameters result falls within the WHO permissible limit. For the heavy metals, Fe (2.18mg/l), Co (0.03 – 0.04mg/l), Cd (0.03 – 0.04mg/l) and Cr (0.09mg/l) were above WHO limit for drinking water while Zn (0.05 – 0.30mg/l) were below the limit. However, Co (0.01mg/l) in Onewa and Cr (0.05mg/l) in Egbele match with WHO permissible limit. The result showed that only Efandion and Egbele borehole water in the study area are safe for drinking while others are not safe because of high concentration of metal present such as Fe, Cd, Co and Cr in the study area, which are capable of causing health hazard to the host communities. From the findings, the result suggested that the affected borehole water in the study area required further treatment beforeconsumption.
Keywords : Borehole water, polyethylene bottles, HNO3 and Bulk scientific 210 VGP model (AAS).