Waste Water Treatment System is water that has been used and made a bit less fresh looking. This kind of water from sinks, showers, bathtubs, etc. goes into wastewater treatment centers to be cleaned for release back into the environment as freshwater. Where does wastewater come from? Whenever you flush the toilet or rinse something down the drain. all that water is considered wastewater as it travels to a local wastewater facility where it’s treated and cleaned before being cycled back into the environment like this . It helps in sewage water treatment .