Zhejiang Wastewater Treatment Plant, Tongxiang, Zhejiang Province

The Zhejiang wastewater treatment plant is located in Zhouquan Town, Tongxiang City, Jiaxing, Zhejiang Province, China. It serves a population of 5,000 and has a designed capacity of 1.00, placing it in the small-scale treatment category typical of rural or peri-urban facilities in the region. China's wastewater treatment standards are governed by the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (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 commonly required to protect downstream water quality. The plant discharges into local waterways that ultimately drain into the Yangtze River Delta, a densely populated and economically vital region. The receiving waters support diverse aquatic life and are important for irrigation and fisheries, making effective treatment critical for ecological and public health.

The plant's treated effluent flows into the local river network within the Yangtze River basin, eventually reaching the East China Sea. This watershed is heavily influenced by agricultural runoff and industrial activity, requiring robust treatment to prevent eutrophication and protect downstream ecosystems that support migratory fish and wetland birds.