Alexandria WWTP - Municipal Wastewater Treatment in Alexandria, Louisiana

Alexandria WWTP is a municipal wastewater treatment facility located in Alexandria, Louisiana, serving an estimated population of 50,688. Situated in Rapides Parish, the plant is part of the city's infrastructure for managing domestic and industrial wastewater. As a medium-sized agglomeration, it plays a key role in protecting local water quality. Under the U.S. Clean Water Act, the plant is required to meet secondary treatment standards through an EPA NPDES permit issued by the Louisiana Department of Environmental Quality. For a population of this scale, typical treatment includes biological processes such as activated sludge or trickling filters, followed by disinfection. The plant's discharge is regulated to ensure compliance with effluent limits for biochemical oxygen demand, total suspended solids, and other pollutants. The treated effluent is discharged into the Red River basin, which flows southward to the Atchafalaya River and eventually into the Gulf of Mexico. This watershed supports diverse aquatic life and is an important corridor for migratory fish. The plant's operations help reduce nutrient loading and protect downstream ecosystems, including the ecologically sensitive Atchafalaya Basin.

The plant discharges into the Red River basin, a major tributary of the Atchafalaya River, which flows into the Gulf of Mexico. This watershed supports diverse aquatic habitats, including wetlands and floodplain forests, and is a critical migratory corridor for fish and birds. Nutrient and pollutant control from the plant helps maintain water quality in this ecologically productive region.