Nei Mongol Wastewater Treatment Plant, Tongliao | Inner Mongolia, China

Nei Mongol wastewater treatment plant is located in Liaohe Town, Horqin District, Tongliao City, Inner Mongolia Autonomous Region, China. It serves a population of approximately 480,000, classifying it as a large-scale municipal facility within the region's urban wastewater infrastructure. As a major treatment plant in Inner Mongolia, it is expected to meet China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which mandates secondary treatment with nutrient removal for plants serving over 100,000 people. The plant's design and operation align with national policies for water pollution control in the Liao River basin. The plant discharges treated effluent into local waterways that ultimately drain into the Liao River system, a major river in Northeast China flowing into the Bohai Sea. Its operation is critical for protecting downstream aquatic ecosystems and supporting water quality in the densely populated and agriculturally active region.

The plant's treated effluent enters the Liao River basin, which flows through Inner Mongolia and Liaoning Province before reaching the Bohai Sea. The Liao River supports diverse aquatic life and is an important water source for irrigation and industry. The plant's nutrient removal helps mitigate eutrophication risks in downstream reservoirs and coastal waters.