meaning of wastewater

Although greywater has a lower level of contamination risk, it can cause health issues if it is not treated to an adequate level if you want to reuse it for toilet flushing, clothes washing or watering the garden.  Industrial Effluents is generated by various industries like Dairy, Textile, Pharmaceuticals, Car washing, Steel plants, Automobiles , electroplating and almost all factories where water is used in process   Treatment of wastewater Both types of wastewater is treated differently.   SEWAGE TREATMENT PLANT or STP   treats domestic sewageand  EFFLUENT TREATMENT PLANT or ETP treats Industrial Effluents

During the natural cycle of water, It flows from   mountain tops down   into the oceans, Humans capture and divert a lot of the water for agriculture, industrial and municipal use. Apart from river water is also drawn from ground by way of Borewell. After the water is used, it is returned to the environment in a different condition, usually as dirty water (wastewater).  Depending on where you live,  ·          Dirty water can be drained into gutters for treatment into common  treatment plant or ·          you have to install a treatment plant for recycling into gardening, toilet flushing or reuse   in industrial   process or discharge to river as per law of local authorities. It is never returned in the same way that it was withdrawn.