STP Avadi - Proposed Wastewater Treatment Plant in Avadi, Tamil Nadu

STP Avadi is a proposed wastewater treatment plant located in Avadi, a suburb of Chennai in Tamil Nadu, India. The plant is designed to serve a population of 240,523, placing it in the category of a large agglomeration under Indian urban wastewater management standards. As a proposed facility, it represents planned infrastructure to address the sanitation needs of this rapidly urbanizing area. Indian wastewater treatment plants of this scale typically employ secondary treatment technologies such as activated sludge or sequencing batch reactors, in compliance with the Central Pollution Control Board (CPCB) norms. The designed capacity is 1.00 million liters per day, indicating a significant treatment capability for the community. The plant will discharge treated wastewater into local water bodies, likely contributing to the Cooum River basin, which flows through Chennai and into the Bay of Bengal. Proper treatment is essential to protect downstream ecosystems and public health in the densely populated region.

STP Avadi will discharge into the Cooum River basin, which flows through Chennai and empties into the Bay of Bengal. The Cooum River is heavily urbanized and receives industrial and domestic effluents, making proper treatment critical to prevent eutrophication and protect coastal biodiversity. The Bay of Bengal supports important fisheries and marine ecosystems, so reducing pollutant loads from inland sources is a regional priority.