M/s Chennai Metropolitan Water Supply and Sewage Board Common STP at Sholinganallur - Chennai Wastewater Treatment Plant

M/s Chennai Metropolitan Water Supply and Sewage Board Common STP at Sholinganallur is a municipal wastewater treatment plant located in the Sholinganallur area of Chennai Corporation, Tamil Nadu, India. Currently under construction, the plant is designed to serve a population of approximately 120,262, addressing the growing wastewater management needs of this urban region. As a facility under the Chennai Metropolitan Water Supply and Sewage Board (CMWSSB), the plant will operate within India's regulatory framework for wastewater treatment. For agglomerations of this scale, Indian standards typically require secondary treatment, with potential for tertiary treatment depending on discharge standards and reuse objectives. The plant's designed capacity of 1.00 million liters per day reflects its role in managing a significant portion of the local sewage load. The plant's treated effluent is expected to be discharged into local water bodies that ultimately drain into the Bay of Bengal. The region's coastal location and dense urban setting make proper treatment critical to protect downstream aquatic ecosystems and public health. The plant will contribute to reducing pollution in Chennai's waterways and supporting the city's environmental sustainability goals.

The plant is located in the coastal city of Chennai, within the watershed that drains into the Bay of Bengal via rivers such as the Adyar and Cooum. The receiving water bodies support diverse aquatic life and are important for local fisheries and livelihoods. Proper treatment is essential to prevent nutrient loading and contamination that could harm these downstream ecosystems.