WASHINGTON STP - Advanced Wastewater Treatment in Washington, Louisiana

WASHINGTON STP is a municipal wastewater treatment facility located in Washington, St. Landry Parish, Louisiana. The plant serves a small community of approximately 1,082 residents and operates under the regulatory framework of the United States Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. Its designed capacity is 567.81 cubic meters per day, with a corresponding daily discharge volume. As an advanced treatment facility, it likely incorporates tertiary processes such as filtration or nutrient removal to meet stringent water quality standards. The treated effluent is discharged into local waterways that ultimately drain into the Gulf of Mexico via the Atchafalaya River basin. The plant plays a critical role in protecting downstream aquatic ecosystems, including the Atchafalaya Delta and coastal wetlands, which support diverse fish and wildlife populations.

The plant discharges into the Atchafalaya River basin, which flows into the Gulf of Mexico. This region includes ecologically sensitive wetlands and delta habitats that support migratory birds, fish, and other aquatic life. Advanced treatment helps minimize nutrient loading and protects water quality in these downstream environments.