Maddur Wastewater Treatment Plant, Karnataka, India

The Maddur wastewater treatment plant is located in Maddur, a town in the Mandya district of Karnataka, India. It serves a population of around 23,384, classifying it as a medium-sized agglomeration under Indian urban wastewater management norms. The plant is operational and plays a key role in managing domestic wastewater from the town. Under India's environmental regulations, wastewater treatment plants serving populations above 10,000 are required to meet secondary treatment standards as per the Central Pollution Control Board (CPCB) guidelines. Typical facilities of this scale employ biological treatment methods such as activated sludge or sequencing batch reactors to reduce organic load and suspended solids before discharge. The treated effluent from the Maddur plant is likely discharged into a local watercourse that drains into the Cauvery River basin, a major river system in southern India. The Cauvery River supports agriculture, drinking water supply, and diverse aquatic ecosystems downstream. Proper treatment at this plant helps protect water quality in the basin and reduces pollution loads entering the river.

The Maddur plant discharges into a tributary of the Cauvery River, which flows through Karnataka and Tamil Nadu before emptying into the Bay of Bengal. The Cauvery basin supports extensive agriculture, including paddy fields, and is a critical water source for millions of people. The plant's operation helps mitigate nutrient and pathogen pollution, safeguarding downstream aquatic life and reducing eutrophication risks in the river and its delta.