STP Manali Wastewater Treatment Plant, Chhyal, Himachal Pradesh

STP Manali is a wastewater treatment facility located in Chhyal, near Manali in the Kullu district of Himachal Pradesh, India. The plant serves a population of approximately 5,670 residents, supporting the local community in this popular Himalayan tourist destination. As a municipal facility, it plays a key role in managing domestic wastewater from the area. In India, wastewater treatment plants serving populations of this scale are typically expected to meet secondary treatment standards under the Water (Prevention and Control of Pollution) Act, 1974, and are regulated by the Himachal Pradesh State Pollution Control Board. The plant's location in a mountainous region requires robust treatment to protect sensitive downstream ecosystems. The treated effluent from STP Manali likely discharges into a tributary of the Beas River, which flows through the Kullu Valley and eventually joins the Sutlej River in Punjab. The Beas River is a vital water source for irrigation and drinking water, and its health is critical for the region's biodiversity, including the endangered Himalayan brown bear and snow leopard habitats in the surrounding protected areas.

STP Manali discharges into the Beas River basin, a major Himalayan river system that flows through Himachal Pradesh and Punjab before joining the Sutlej River. The Beas River supports diverse aquatic life, including the endangered golden mahseer fish, and provides water for agriculture and drinking downstream. The plant's location in a mountainous, ecologically sensitive area means that effective wastewater treatment is essential to prevent nutrient pollution and maintain water quality in this important river system.