Water is an essential part of the ecological system. Geographically, water covers about 70% of the entire area of the Earth s surface and it is found in oceans, streams, seas, rivers, lakes, ponds, springs and underground (Ogunji, 2004). Biologically, water makes up a large proportion of the total body fluid system of living things. An average water consumption rate of ten liters per person per day has been recommended for small rural communities (UNICEF, 1988). This value is very small compared to World Health Organization (WHO) standard of at least twenty liters per day per person.
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