Sichuan Wastewater Treatment Plant, Nanbu County, Sichuan Province

The Sichuan wastewater treatment plant is located in Nanbu County, part of Nanchong City in Sichuan Province, China. It serves a population of around 112,500 people, placing it in the medium-to-large agglomeration category. The plant is situated along Jialing Avenue, near the Jialing River, a major tributary of the Yangtze River. As a facility serving over 100,000 people, it operates under China's national wastewater discharge standards, which require secondary treatment as a minimum for urban plants. Chinese regulations mandate that plants of this scale meet Class 1A or 1B discharge standards under the GB 18918-2002 framework. The treated effluent is discharged into the Jialing River, which flows southward to join the Yangtze River at Chongqing. The Jialing River supports diverse aquatic life and provides water for irrigation and domestic use. The plant plays a key role in protecting water quality in this densely populated region of the Yangtze basin.

The plant discharges into the Jialing River, a major tributary of the Yangtze River. The Jialing River basin supports a rich aquatic ecosystem and is an important water source for agriculture and communities in Sichuan. Downstream, the Yangtze River flows through central and eastern China, eventually reaching the East China Sea. The plant's operations help reduce nutrient and pollutant loads entering this critical river system.