Porur Lake (also called Retteri in local language), is located on the fringes of Porur in south-west Chennai and is a primary water resource for people residing in Chennai. It is a temporary catchment area connected with Chembarambakkam Lake. It is spread over 200 acres with a capacity of 46 million cubic feet (mcft).
There are four filters working 24x7 to pump water to K. K. Nagar double tank distribution point. Bathing, Washing and/or Swimming is currently prohibited in this lake from 1995. A better view of the lake can be appreciated from the Chennai bypass
In 2012, the Water Resources Department initiated a project to increase the capacity the tank along with two other lakes in the city at a cost of ₹ 130 crore. This would deepen the lake by at least 1 m and increases the capacity to 70 mcft.