Hainan Wastewater Treatment Plant, Ledong Li Autonomous County, Hainan Province

The Hainan wastewater treatment plant is located in Baoyou Town, Ledong Li Autonomous County, Hainan Province, China. It serves a population of approximately 60,000, classifying it as a medium-sized municipal facility within the region's wastewater infrastructure. As a plant in China, it operates under the national Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002), which sets effluent limits based on receiving water sensitivity. For a facility of this scale, secondary treatment with nutrient removal is typically required to meet Class 1-A or 1-B standards, especially if discharging into sensitive water bodies. The plant's treated effluent likely discharges into local rivers or streams that flow toward the South China Sea, given Hainan's coastal geography. The surrounding watershed supports agricultural and ecological systems, and proper treatment helps protect downstream water quality and marine habitats.

The plant is located in Hainan Province, an island region with rivers draining east and south into the South China Sea. The nearest river systems, such as the Changhua River or Nandu River, may receive treated effluent before reaching coastal waters. The downstream environment includes estuaries and coral reef ecosystems that are sensitive to nutrient pollution, making effective wastewater treatment critical for maintaining marine biodiversity.