A Survey of Industrial Pollution in Anambra State, An Assessment of Water Quality Parameters of Rivers Dodo, Oji and Ebenebe Lake

Abstract

A survey of industrial pollution in Anambara state was carried out between February 1990 and June 1991. The survey showed that Idemili, Onitsha, and Nnewi Loal Government Areas have the greatest concentration of industries. Some of these industries discharge their wastes into the environment with very little or no treatment. Physico-chemical characteristics of rivers Dodo, Oji and Ebenebe lake were determined. The concentrations of some water-quality-parameters viz. dissolve oxygen (DO), biochemical oxygen demand (BOD), sulphate, nitrate, chloride, conductivity, and acid levels were studied. Concentration levels of trace metals, K, Na, Ca, Mg, Cu, Zn, Fe, Pb, Ni, Cr, and Cd were also measured A comparison of the results from the above analysis and the standards set by the World Health Organization, WHO, as highest desirable and maximum permissible levels for drinking water did not show any serious difference as to indicate pollution in these surface waters