Monroe Water Pollution Control Center - Wastewater Treatment in Monroe, Louisiana

The Monroe Water Pollution Control Center is a municipal wastewater treatment facility located in Monroe, Ouachita Parish, Louisiana. Serving an estimated population of 76,000, the plant is a key component of the city's infrastructure, managing wastewater from residential and commercial sources in the region. As a facility in the United States, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Louisiana Department of Environmental Quality. For a population of this scale, secondary treatment is typically required, with potential additional nutrient removal standards depending on the receiving water body's sensitivity. The plant's treated effluent is discharged into the Ouachita River, a major tributary of the Red River, which flows into the Atchafalaya River and ultimately the Gulf of Mexico. This river system supports diverse aquatic life and provides habitat for fish and migratory birds, making effective wastewater treatment essential for maintaining ecological balance.

The plant discharges into the Ouachita River, which flows into the Red River and then the Atchafalaya River before reaching the Gulf of Mexico. This watershed supports a variety of aquatic species and is an important corridor for migratory waterfowl. The region's subtropical climate and flat terrain can lead to slow-moving waters, increasing the potential for nutrient accumulation and algal blooms if treatment is inadequate.