Chongqing Wastewater Treatment Plant, Jiangjin District, Chongqing, China

The Chongqing wastewater treatment plant is located in the Dexian Industrial Park on Shuangxing Road, Jiangjin District, Chongqing, China. It serves a population of approximately 21,000, classifying it as a small to medium agglomeration under Chinese municipal wastewater management. As a plant in China, it is subject to the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits for conventional pollutants and nutrients. For plants of this scale, secondary biological treatment is typically required, with potential additional nutrient removal if discharging into sensitive water bodies. The plant's treated effluent likely discharges into a local waterway within the Yangtze River basin, as Chongqing is situated along the upper reaches of the Yangtze. The Yangtze River downstream supports diverse aquatic ecosystems and provides water for millions of people, making effective treatment critical for water quality and ecological health.

The plant is located in the Yangtze River basin, one of the world's most important river systems. Treated wastewater likely flows into a tributary of the Yangtze, which ultimately drains into the East China Sea. The downstream environment includes critical habitats for fish and migratory birds, and the river supports extensive agricultural and urban water use. Effective treatment helps reduce nutrient and pollutant loads, protecting water quality in this densely populated region.