Sichuan Wastewater Treatment Plant, Jiufeng, Leshan, Sichuan

The Sichuan wastewater treatment plant is located in Jiufeng, part of the Shizhong District in Leshan City, Sichuan Province, China. It serves a population of approximately 543,900, classifying it as a large urban agglomeration under Chinese wastewater management standards. The plant is situated along the S103 road in the Dafo Street area, near the Min River. As a large-scale facility, the plant is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which mandates secondary treatment with nutrient removal for plants serving over 100,000 people. The regulatory framework also requires compliance with local environmental protection bureau permits, ensuring treated effluent meets specified limits for biochemical oxygen demand, chemical oxygen demand, suspended solids, and nutrients. The plant's treated effluent likely discharges into the Min River, a major tributary of the Yangtze River. The Min River flows through Leshan and eventually joins the Yangtze at Yibin. This water body supports diverse aquatic life and provides water for agricultural and industrial use downstream. The plant plays a critical role in protecting the Min River and Yangtze ecosystem from untreated sewage.

The plant discharges into the Min River, which flows through Leshan and joins the Yangtze River at Yibin. The Yangtze River basin is one of the world's most biodiverse freshwater ecosystems, supporting numerous fish species and migratory birds. The plant's treatment performance directly affects water quality in this ecologically sensitive river system, which also supplies drinking water to millions downstream.