Hainan Wastewater Treatment Plant, Nanfeng Town, Hainan Province, China

The Hainan wastewater treatment plant is located in Nanfeng Town, Danzhou City, Hainan Province, China. It serves a population of approximately 100,000 people, classifying it as a medium-to-large agglomeration under Chinese wastewater management standards. The plant's designed capacity is 1. In China, wastewater treatment plants of this scale are typically regulated under national standards such as the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). This standard sets effluent limits for various pollutants and requires treatment levels appropriate to the receiving water's sensitivity. Plants serving populations over 100,000 often employ secondary or advanced treatment to meet these requirements. The plant discharges into local water bodies within the Hainan Island watershed. Hainan's tropical climate and coastal ecology make proper wastewater treatment crucial for protecting downstream environments, including rivers that flow into the South China Sea. The plant's operation supports public health and environmental quality in the region.

The plant is located inland on Hainan Island, more than 50 km from the coast. Its treated effluent likely enters local rivers that drain into the South China Sea. Hainan's tropical ecosystems include sensitive coral reefs and mangrove habitats near the coast, which benefit from effective nutrient and pollutant removal. The plant's discharge contributes to the overall water quality of the island's river systems and ultimately the marine environment.