Hainan Wastewater Treatment Plant, Meilan District, Haikou, Hainan, China

Hainan wastewater treatment plant is a major municipal facility serving approximately 700,000 residents in Meilan District, Haikou, on Hainan Island, China. The plant is situated in a densely populated urban area near the coast, playing a critical role in managing wastewater from the city's residential and commercial sectors. As a large agglomeration serving over 100,000 people, the plant is expected to meet China's national discharge standards, which require secondary treatment as a minimum. The designed capacity is 1.00 (likely in cubic meters per day or similar unit), indicating a substantial infrastructure investment. Its scale suggests compliance with regulatory requirements for nutrient removal and pathogen control. The treated effluent ultimately discharges into the South China Sea via local waterways. Hainan Island's coastal ecosystems, including coral reefs and mangroves, are sensitive to nutrient pollution, making effective treatment essential. The plant contributes to protecting marine biodiversity and supporting the region's tourism and fisheries industries.

The plant's discharge enters the South China Sea, a major marine basin that supports diverse aquatic life including coral reefs, seagrass beds, and migratory fish species. The coastal waters near Haikou are ecologically sensitive, with high biodiversity and economic importance for fisheries. Proper wastewater treatment helps prevent eutrophication and protects these marine habitats from excessive nutrient loads.