Sichuan Wastewater Treatment Plant, Yanling Town, Neijiang, Sichuan

The Sichuan wastewater treatment plant is located in Yanling Town, Weiyuan County, within the city of Neijiang, Sichuan Province, China. The facility serves a population of approximately 81,700 people, placing it in the medium agglomeration category under Chinese wastewater regulations. As a municipal treatment plant in China, it operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits based on the receiving water body's sensitivity. For plants of this scale, secondary treatment with nutrient removal is typically required to meet Class 1-A or 1-B standards, especially when discharging into sensitive water bodies. The plant's treated effluent likely discharges into a local river within the Yangtze River basin, which ultimately flows into the East China Sea. The facility plays a key role in protecting downstream water quality and aquatic ecosystems in the region.

The plant discharges into a tributary of the Tuo River, which is part of the larger Yangtze River basin. The Yangtze River supports diverse aquatic life and provides water for millions of people. Effective treatment at this plant helps reduce nutrient and pollutant loads, protecting downstream ecosystems and water quality in the East China Sea.