As the northeast monsoon draws close, rainwater harvesting (RWH) systems in the city may be in urgent need of repair and maintenance, water conservation experts say.
Only a handful of houses in the city's outlying areas harvest rainwater from the drivewaysetback area, says a 2015 audit, whose findings have recently been made public. These structures were only harvesting rainwater from rooftops.

The Chennai Metropolitan Development Authority (CMDA) ordered the audit which was carried out by Akash Ganga Trust's Rain Centre in added areas such as Thiruvottiyur, Kottivakkam, Ambattur, Porur, Velachery and Tambaram.....................Read more

Source: The Times of India