EROS STP Wastewater Treatment Plant, Eros, Louisiana

EROS STP is a municipal wastewater treatment facility located on Holton Road in Eros, Jackson Parish, Louisiana. The plant serves a small population of 155 residents, reflecting its role in a rural community within the state. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 113.56 units and a discharge volume of 102.21 units, the facility operates within its capacity. As a U.S. plant, it is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body, ultimately draining into the Ouachita River basin and then the Mississippi River. This downstream pathway connects to the Gulf of Mexico, making the plant's performance important for regional water quality and aquatic ecosystems.

The plant discharges into a local stream that flows into the Ouachita River, part of the larger Mississippi River basin. This watershed supports diverse aquatic life and provides habitat for fish and migratory birds. The treated effluent contributes to the flow of these waters, and maintaining low pollutant loads is essential to prevent nutrient enrichment and hypoxia in the Gulf of Mexico.