The Government has decided to act to save the shrinking catchment area of the Thippagondanahalli Reservoir, an important source of drinking water to Bangalore city. The reservoir built in 1934 is the second oldest source after the Hesaraghatta Lake. It supplies 125 million litres of water every day to Bangalore and its surrounding areas. Under Section 18 (I b) of the Prevention and Control of Pollution Act, 1974 and 1981, the State Government has declared the catchment area of T.G. Halli a "regulated zone". This means the industries that have come up in the catchment area will not be allowed to let their waste flow into the reservoir. Future development in the catchment area is likely to be restricted.