STP Summer Hill Shimla - Wastewater Treatment Plant in Dianda, Himachal Pradesh

STP Summer Hill Shimla is a municipal wastewater treatment plant located in Dianda, near Shimla in Himachal Pradesh, India. The plant serves a population of around 26,257, making it a medium-sized facility for the region. It is situated in the Himalayan foothills, an area known for its tourism and environmental sensitivity. As a plant in India, it operates under the national regulatory framework of the Central Pollution Control Board (CPCB) and the State Pollution Control Board of Himachal Pradesh. For a facility serving this population, secondary treatment is typically required to meet effluent standards. The plant is operational and contributes to managing the wastewater from the Shimla urban agglomeration. The treated effluent is likely discharged into a local stream that feeds into the Yamuna River basin, which ultimately drains into the Bay of Bengal. The plant plays a crucial role in protecting the fragile Himalayan ecosystem and downstream water quality, especially given the region's importance for water supply and biodiversity.

The plant is located in the Himalayan foothills, within the Yamuna River basin. Treated wastewater likely enters a tributary of the Yamuna, which flows through the Indo-Gangetic Plain and into the Bay of Bengal. The region supports diverse aquatic life and is ecologically sensitive due to its mountainous terrain and seasonal monsoon flows.