Water is drawn from Red Hills Lake and Chembarambakkam Lake, the primary water reservoirs of the city,[155] and treated at water treatment plants located at Kilpauk, Puzhal, Chembarambakkam[156] and supplied to the city through 27 water distribution stations.[157] The city receives 530 million liters per day (mld) of water from Krishna River through Telugu Ganga project, 180 mld of water from the Veeranam lake project[156] and 100 mld of water from the Minjur desalination plant, the country's largest sea water desalination plant.[158][159][160] However, Chennai is predicted to face a huge deficit of 713 mld in 2026 as the demand is projected at 2,248 mld and supply estimated at only 1,535 mld.[161] The city's sewer system was designed in 1910, with some modifications in 1958.[162] There are 714 public toilets in the city managed by the city corporation,[163] and 2,000 more have been planned by the corporation.[164] The corporation also owns 52 community halls across the city.[165]