Clayton Lagoon Wastewater Treatment Plant, Clayton, Louisiana

Clayton Lagoon is a municipal wastewater treatment facility located in Clayton, Concordia Parish, Louisiana. The plant serves a small population of 917 residents, providing advanced treatment to protect local water quality. As a lagoon-based system, it relies on natural processes to treat wastewater before discharge. The plant operates with advanced treatment capabilities, exceeding the secondary treatment standard required by the US Clean Water Act. With a designed capacity of 492.10 m³/day and an average daily flow of 378.54 m³/day, the facility operates below its capacity, indicating room for future growth. Under the National Pollutant Discharge Elimination System (NPDES), such plants must meet stringent effluent limits to safeguard receiving waters. The treated effluent is discharged into local waterways that drain into the Mississippi River basin. The Mississippi River system supports diverse aquatic life and provides drinking water for millions. Advanced treatment at Clayton Lagoon helps reduce nutrient loading and protects downstream ecosystems in the Gulf of Mexico.

The plant discharges into tributaries of the Mississippi River, which flows into the Gulf of Mexico. This region is part of the Mississippi River Alluvial Plain, an ecologically significant area that supports wetlands, fish, and migratory birds. Advanced treatment helps minimize nutrient pollution, which can contribute to hypoxic zones in the Gulf.