Nei Mongol Wastewater Treatment Plant, Qipanjing, Inner Mongolia

The Nei Mongol wastewater treatment plant is located in Qipanjing Town, Otog Banner, Ordos City, Inner Mongolia Autonomous Region, China. It serves a population of approximately 38,000 residents in this industrial and mining region of western Inner Mongolia. As a municipal treatment facility in China, the plant is subject to the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), which sets effluent limits for various pollutants. For a plant serving a medium-sized agglomeration of 38,000 people, secondary treatment with nutrient removal is typically required to meet Class 1A or 1B standards, depending on the receiving water's sensitivity. The plant discharges treated wastewater into local watercourses that ultimately drain into the Yellow River basin, a major river system in northern China. The region's semi-arid climate and heavy industrial activity make water quality management critical for protecting downstream ecosystems and agricultural water use.

The plant's treated effluent flows into local streams that are part of the Yellow River basin, one of China's most important water systems. The Yellow River downstream supports irrigation, drinking water supplies, and diverse aquatic life, including endemic fish species. The semi-arid environment of Inner Mongolia means that water resources are scarce, and maintaining good water quality in the basin is essential for both ecological health and human use.