Raw water treatment plant receives the raw water, where the first of five primary unit water treatment processes begin the process of making the water safe to drink. The process includes chemical coagulation, flocculation, sedimentation, filtration, and disinfection. As much suspended solids as possible must be eliminated during wastewater treatment before the leftover water, known as effluent, is released back into the environment. The oxygen that is needed by the aquatic plants and animals is depleted during the breakdown of solid matter. Raw water treatment plant combines procedure like biological, chemical, physical and physiochemical for eliminating undesirable qualities in water.