Jonesville STP Wastewater Treatment Plant, Jonesville, Louisiana

Jonesville STP is a municipal wastewater treatment facility located in Jonesville, Catahoula Parish, Louisiana. The plant serves a population of approximately 2,720 residents and operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 1,514.16 thousand gallons per day and an average discharge volume of 870.65 thousand gallons per day, the facility operates well within its capacity. The treated effluent is discharged into local waterways that ultimately drain into the Ouachita River basin, contributing to the Mississippi River watershed. This inland location supports aquatic ecosystems in the region's rivers and wetlands, which are important for biodiversity and water quality.

The plant discharges into the Ouachita River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. The surrounding watershed includes bottomland hardwood forests and wetlands that provide critical habitat for fish, birds, and other wildlife. Maintaining secondary treatment standards helps protect these ecosystems from nutrient pollution and oxygen depletion.