Kalamboli Wastewater Treatment Plant, Panvel, Maharashtra, India

Kalamboli wastewater treatment plant is located in Panvel, Maharashtra, India, serving a population of 334,060. The plant is operational and plays a key role in managing municipal wastewater for this growing urban area within the Mumbai Metropolitan Region. The plant operates under India's Water (Prevention and Control of Pollution) Act, 1974, and the Environmental Protection Rules, 1986. For a population of this scale, secondary treatment is typically required, with potential for tertiary treatment depending on local discharge standards. The treated effluent is discharged into local water bodies that ultimately drain into the Ulhas River estuary and the Arabian Sea. The plant's proximity to the coast (within 50 km) underscores the importance of effective treatment to protect coastal ecosystems and marine biodiversity.

The plant's discharge flows into the Ulhas River system, which drains into the Arabian Sea via the Thane Creek and Mumbai Harbor. This coastal region supports diverse aquatic life, including mangroves and fish species, and is ecologically sensitive due to urban and industrial pressures. Proper wastewater treatment is critical to prevent nutrient loading and contamination in this estuarine environment.