ABSTRACT
Water is the most basic need of mankind. The utilization of water for various activities depends on its physical, chemical, and biological characteristics. This includes public water supply for drinking and domestic purposes, industrial activities, propagation of aquatic and wildlife, water-based recreational activities, commercial fishing, and esthetic enjoyment. And, since drinking water is considered to be the most essential use of water for life, it must be free of health hazards such as pathogens, toxins, and carcinogens.
