Mooringsport STP - Advanced Wastewater Treatment in Mooringsport, Louisiana

Mooringsport STP is a municipal wastewater treatment facility located at 108 Daniels Street in Mooringsport, Caddo Parish, Louisiana. The plant serves a small population of 833 residents, reflecting the rural character of the area. The plant provides advanced treatment, exceeding the secondary treatment standard required by the US Clean Water Act for municipal facilities. Its designed capacity is 454.25 volume units, with a matching discharge volume, indicating consistent operation. As a US facility, it operates under an EPA National Pollutant Discharge Elimination System (NPDES) permit issued by the Louisiana Department of Environmental Quality, which sets effluent limits to protect water quality. The treated wastewater is discharged into local streams that drain into the Red River basin, ultimately reaching the Mississippi River and the Gulf of Mexico. This small plant plays a key role in protecting downstream aquatic ecosystems from nutrient pollution and pathogens.

The plant discharges into tributaries of the Red River, which flows into the Mississippi River and then the Gulf of Mexico. The Red River basin supports diverse aquatic life, including fish and mussel species. Advanced treatment helps reduce nutrient loading, which is critical for preventing hypoxia in the Gulf of Mexico.