The dependence on lakes, tanks, ponds, wells and other sources, in the past for supply of raw water to the city was de???linked with treated supplies arranged from river based schemes such as the Chamarajendra Water Works" (Hesaraghatta Lake) built in 1894 and the Chamarajasagar Reservoir at T G Halli across the Arkavathy River in 1933 and subsequent sourcing from the Cauvery River schemes.[12]