Waste water is an important reservoir for E.coli and presented significant acute toxicity if released into the receiving water body without being adequately treated. contamination of drinking water by pathogenic bacteria causes the most significant health risk to humans, and there have been countless numbers of disease outbreaks and poisonings resulting from exposure to untreated or poorly treated drinking water. However, significant risks to human health may also result from exposure to toxic contaminants that are often globally ubiquitous in waters from which drinking water is derived.The magnitude of the problem of bacterial contamination deserves more elaborative studies from the point of production of waste effluents to the point of consumption at all intermediary levels.