Physicochemical evaluation of bore-hole water from selected fish farms in Edo State, Nigeria

Abstract

This study investigated the physical and chemical properties of water from bore-holes in selected fish farms in the three districts of Edo State, Nigeria. Sample collection, treatment and determination of physical and chemical properties were according to approved standards. The results showed that all the parameters analyzed were within the required standards for aquaculture and drinking purposes, except pH which was slightly acidic, alkalinity in Edo South which was very low, and the metals Mn and Pb whose concentrations exceeded the standard limits for drinking water. Based on the acceptable levels of most of the parameters, it was concluded that the water of the study area was suitable for aquaculture, drinking and other domestic purposes. However, because of the pH and the heavy metals Mn and Pb, it was recommended that the water be treated with lime before use especially in aquaculture facilities, in order to increase pH and possibly reduce metal concentrations to tolerable limits through precipitation and or adsorption, to sediment particles and thus lead to production of suitable fish for consumers.