More than 10 years after it was made mandatory, BMC has failed to ensure rainwater harvesting in most new buildings.
A study by Observer Research Foundation, a think tank on public policy, has revealed most new buildings do not have rainwater harvesting facilities.
It said even if half the developed area in the city was roofed for rainwater harvesting, about 590 million litres — almost a sixth of the 3,000 million litres BMC supplies — could be generated every day. The study, to be released by mayor Sunil Prabhu Saturday, also revealed the city wastes over 900 million litres daily, much more than the about 650 million litres supplied in Pune.