Hunan Wastewater Treatment Plant, Yizhang County, Chenzhou, Hunan Province

The Hunan wastewater treatment plant is located in Yizhang County, Chenzhou City, Hunan Province, China. It serves a population of approximately 129,400, classifying it as a medium-to-large agglomeration under Chinese wastewater management standards. The facility is situated in a rapidly urbanizing region of southern China, where industrial and domestic wastewater treatment is critical for environmental protection. As a plant serving over 100,000 people, it is expected to meet secondary or advanced treatment standards under China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). Chinese regulations mandate robust treatment for facilities of this scale to protect receiving waters. The treated effluent from the plant likely discharges into local rivers that are part of the Xiang River basin, which flows into Dongting Lake and ultimately the Yangtze River. This downstream connection underscores the plant's role in safeguarding water quality in one of China's major river systems, supporting aquatic ecosystems and downstream water uses.

The plant's discharge enters the Xiang River basin, a tributary of the Yangtze River. The Xiang River flows through Hunan Province into Dongting Lake, a large freshwater lake that supports diverse aquatic life and provides critical habitat for migratory birds. The lake also regulates floodwaters and supplies water for agriculture and industry downstream. Effective treatment at this plant helps reduce nutrient and pollutant loads that could otherwise contribute to eutrophication in Dongting Lake and the Yangtze River.