LELAND POTW | Wastewater Treatment Plant in Washington County, Mississippi

LELAND POTW is a municipal wastewater treatment plant located in Washington County, Mississippi, serving a population of around 6,655. The facility is situated inland, more than 50 km from the coast, and discharges into local waterways that ultimately drain into the Mississippi River basin. As a US-based plant, LELAND POTW operates under the National Pollutant Discharge Elimination System (NPDES) permit program, established by the Clean Water Act. For a plant serving a small population of this size, secondary treatment is typically required, with effluent limits based on the receiving water body's assimilative capacity. Regulatory compliance is ensured through state-level oversight by the Mississippi Department of Environmental Quality. The treated effluent from LELAND POTW enters local streams and rivers that flow into the Mississippi River, eventually reaching the Gulf of Mexico. The plant plays a role in protecting water quality in the Lower Mississippi River basin, which supports diverse aquatic life and is an important migratory corridor for birds and fish. Proper treatment helps reduce nutrient loads that could contribute to hypoxia in the Gulf.

LELAND POTW discharges into local waterways that are part of the Mississippi River basin, which drains into the Gulf of Mexico. The Lower Mississippi River and its tributaries support a rich ecosystem, including fish species such as catfish and bass, and provide habitat for migratory waterfowl. The plant's location in the Mississippi Delta region means that nutrient management is critical to prevent downstream eutrophication and the seasonal hypoxic zone in the Gulf.