Henan Wastewater Treatment Plant, Xinmi, Henan Province, China

The Henan wastewater treatment plant is located in Xinmi, a city under the administration of Zhengzhou in Henan Province, China. The facility serves a population of approximately 26,000, placing it in the category of a medium-sized municipal treatment plant. It is situated inland, away from coastal areas, and its operations are integral to the local water management infrastructure. As a Chinese wastewater treatment facility, the plant is subject to the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent quality limits based on the receiving water body's sensitivity. For plants serving populations around 26,000, secondary treatment with nutrient removal is typically required to meet Class 1-A or 1-B standards, especially if the effluent is discharged into sensitive water bodies. The plant's treated effluent likely discharges into a local river or stream within the Huai River basin, which ultimately flows into the Yellow Sea. The receiving water body supports agricultural and ecological functions, and the plant's compliance with discharge standards helps protect downstream water quality and aquatic habitats.

The plant is located in the Huai River basin, which drains into the Yellow Sea via the Huai River and its tributaries. The region is characterized by intensive agriculture and urban development, making effective wastewater treatment critical to prevent eutrophication and protect downstream aquatic ecosystems. The plant's effluent contributes to the water quality of local rivers that support irrigation and biodiversity.