The detailed process of making water more potable or useful, such as by purifying, clarifying, softening, or deodorizing it, is depicted in this Water Treatment Process Flow Diagram. The five stages of water treatment are also shown in this Water Treatment Process Flow Diagram. The five major unit processes are chemical coagulation, flocculation, sedimentation, filtration, and disinfection. As the water passes through the various treatment processes, chemicals are added. Water purification systems remove all contaminants and hazardous substances from water, rendering it clean and safe to drink. After completing this process, you will have continuous access to clean and refreshing water.