STP Keylong Phase II - Non-Operational Primary Treatment Plant in Keylang, Himachal Pradesh

STP Keylong Phase II is a wastewater treatment plant located in Keylang, in the Lahaul and Spiti district of Himachal Pradesh, India. The plant serves a small population of 306 and has a designed capacity of 289 m³/day, though it is currently non-operational. As a primary treatment facility, the plant provides basic physical treatment such as sedimentation to remove settleable solids. Under India's environmental regulations, small plants like this are expected to meet discharge standards set by the Central Pollution Control Board (CPCB), which may require secondary treatment for sensitive areas. The plant's non-operational status suggests that wastewater management in the area may rely on alternative methods. The plant is located inland, far from the coast, and its treated wastewater would likely discharge into local streams or rivers that eventually drain into the Indus River basin. The region is ecologically sensitive due to its high-altitude Himalayan environment, supporting diverse aquatic life and serving as a water source for downstream communities.

The plant is situated in the high-altitude Himalayan region of Lahaul and Spiti, where water bodies are fed by glacial melt and support fragile ecosystems. Any discharge would likely enter local tributaries of the Indus River, which flows through India and Pakistan before reaching the Arabian Sea. The area is ecologically sensitive, with cold-water fish species and unique biodiversity that depend on clean water. Proper wastewater treatment is critical to prevent contamination of these pristine waters.