Nagpur’s sewage treatment infrastructure is helping conserve precious reservoir water, with 390 million litres per day (MLD) of treated sewage supplied to Mahagenco’s Koradi and Khaparkheda thermal power plants, reducing their dependence on freshwater. Nagpur: Nagpur’s sewage treatment infrastructure is helping conserve precious reservoir water, with 390 million litres per day (MLD) of treated sewage supplied to Mahagenco’s Koradi and.