Industrial pollution has been and continues to be a major factor causing the degradation of the
environment around us, affecting the water we use, the air we breathe and the soil we live on.
But of these, the pollution of water is arguably the most serious threat to currenthuman welfare. Water is polluted not only by industries but also by households. Both
industries and household wastewater contain chemicals and biological matter that
impose high demands on the oxygen present in water. Urban rivers have been associated
with water quality problems and the practice of discharging untreated domestic and industrial
waste into the water course has emerged to an alarming level (Hall, 1984).