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Chlorine-based disinfectants are most commonly used because they are very effective. Chlorine-based disinfectants also provide residual protection against biological contamination in the water distribution system. This is a critical step to assure our water is safe all the way to the consumer's tap.
and requires less treatment. In the case of surface water, pre-treatment such as coagulation, sedimentation and filtration is generally used to prepare the water before its final disinfection. Hence, apt protective measures and management of raw water reservoirs are capable of minimising need for chemical disinfection of the drinking water.
