Yunnan Wastewater Treatment Plant, Longyang District, Baoshan, Yunnan

Yunnan wastewater treatment plant is located in Yongchang Subdistrict, Longyang District, Baoshan City, Yunnan Province, China. It serves a population of approximately 179,500, placing it in the medium-to-large agglomeration category for Chinese municipal wastewater infrastructure. Under China's national wastewater discharge standards (GB 18918-2002), plants serving populations over 100,000 are typically required to achieve at least secondary treatment, with many larger facilities implementing advanced treatment for nutrient removal. The regulatory framework ensures compliance with effluent standards for receiving water bodies. The plant discharges treated wastewater into local waterways that ultimately drain into the Mekong River basin, which flows through multiple Southeast Asian countries before reaching the South China Sea. The facility plays a key role in protecting downstream aquatic ecosystems and supporting regional water quality goals.

The plant's treated effluent enters local streams that are part of the Mekong River basin, one of the world's major transboundary river systems. The Mekong supports diverse aquatic life, including migratory fish species, and provides water for agriculture and communities in Yunnan and downstream countries. Proper wastewater treatment is critical to prevent nutrient pollution and maintain ecological balance in this sensitive watershed.