Nei Mongol Wastewater Treatment Plant, Tongliao, Inner Mongolia

The Nei Mongol wastewater treatment plant is located in Hongxing Subdistrict, Horqin District, Tongliao City, Inner Mongolia Autonomous Region, China. It serves a population of approximately 380,000, 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 subject to China's Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits for conventional pollutants, nutrients, and pathogens. For plants serving populations over 100,000, Chinese regulations typically require secondary treatment with nutrient removal in sensitive watersheds. The plant's treated effluent likely discharges into local watercourses that drain into the Liao River basin, ultimately reaching the Bohai Sea. The facility plays a critical role in protecting downstream aquatic ecosystems and supporting water quality in the semi-arid Inner Mongolia region.

The plant is situated in the Liao River basin, which flows eastward through northeastern China before emptying into the Bohai Sea. The downstream environment includes agricultural areas and wetlands that depend on adequate water quality. The facility's discharge contributes to the ecological health of the Liao River system, which supports diverse aquatic life and provides water for irrigation and municipal use.