STP Kondli phase I - Delhi Wastewater Treatment Plant Serving 300,000+

STP Kondli phase I is a wastewater treatment plant located in Kondli, Mayur Vihar Tehsil, East Delhi, Delhi, India. It serves a population of approximately 300,654, making it a large-scale facility critical to the city's sanitation infrastructure. The plant is operational and contributes to the treatment of domestic wastewater from the eastern part of Delhi. As a large agglomeration serving over 150,000 people, the plant is expected to meet secondary treatment standards under India's Central Pollution Control Board (CPCB) guidelines. These regulations align with the country's Water (Prevention and Control of Pollution) Act, 1974, which mandates treatment to protect water quality. Facilities of this scale typically employ biological treatment methods such as activated sludge or sequencing batch reactors. The treated effluent from STP Kondli phase I is likely discharged into the Yamuna River, which flows through Delhi and is a major tributary of the Ganges. The Yamuna is heavily impacted by urban runoff and untreated sewage, making the plant's role crucial for reducing pollution loads. Downstream, the river supports diverse aquatic life and provides water for irrigation and domestic use, highlighting the environmental significance of effective wastewater treatment.

STP Kondli phase I discharges treated wastewater into the Yamuna River, a major tributary of the Ganges. The Yamuna flows through Delhi and downstream through Uttar Pradesh, eventually joining the Ganges at Triveni Sangam in Prayagraj. The river supports a rich ecosystem, including fish species and migratory birds, and is a vital water source for millions. Effective treatment at this plant helps reduce organic and nutrient pollution, mitigating eutrophication and protecting downstream biodiversity.