Mechanism The lake water is treated at Vadakuthu Water Treatment Plant by pumping raw water at a distance of 20 km from Sethiathope to Vadakuthu through 1,775 mm diameter mild steel pipe [REF].
In November 2012, the state government sought permission from the Union ministry of environment and forests for environmental clearance to build a one-tmcft reservoir at Thervoykandigai in Tiruvallur district to augment drinking water supply for the city, which if realized, would become the fifth reservoir in the metropolitan region.