Motagaon Wastewater Treatment Plant, Kalyan-Dombivli, Maharashtra

Motagaon wastewater treatment plant is located in Dombivli West, Kalyan-Dombivli, in the Thane district of Maharashtra, India. Designed to serve a population of 93,537, the plant has a capacity of 1.00 MLD, reflecting its role in managing municipal wastewater for this suburban area within the Mumbai Metropolitan Region. The plant is currently non-operational. Under India's environmental regulations, wastewater treatment plants serving populations over 50,000 are expected to meet secondary treatment standards as per the Central Pollution Control Board (CPCB) norms. The plant's designed capacity aligns with the scale of the community it was built to serve. The treated effluent from the plant would discharge into local water bodies that ultimately drain into the Ulhas River, which flows into the Arabian Sea. The Ulhas River estuary supports diverse aquatic life and is an important ecological corridor in the region.

The Motagaon plant is situated in the Ulhas River basin, which drains into the Arabian Sea via the Ulhas River estuary. This estuarine ecosystem supports mangroves, fish, and migratory birds, making it ecologically sensitive. The plant's non-operational status may pose risks to local water quality if untreated sewage reaches the river.