Question raised in Rajya Sabha on Discharge of industrial waste into the rivers, 07/01/2019. As per the Environment (Protection) Act, 1986 and Water (Prevention and Control of Pollution) Act, 1974 industrial units are required to install effluent treatment plants(ETPs) and to treat their effluents to comply the stipulated environmental standard before discharging it into any water bodies. According to Central Pollution Control Board (CPCB), there are 2743 Grossly Polluting Industries (GPIs) in the country discharging their effluents into various water bodies, including rivers.