STONEWALL POTW - Secondary Wastewater Treatment Plant in Stonewall, Mississippi

STONEWALL POTW is a municipal wastewater treatment plant located on Boatramp Road in Stonewall, Clarke County, Mississippi. The facility serves a population of approximately 830 residents and operates as part of the region's wastewater infrastructure. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal facilities of this scale. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 1211.33 volume units and currently discharges 662.45 volume units, indicating operational capacity below its design limit. The treated effluent is discharged into local receiving waters that ultimately drain into the Pascagoula River basin, which flows into the Gulf of Mexico. This watershed supports diverse aquatic ecosystems and is important for regional water quality. The plant's operations are subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Mississippi Department of Environmental Quality.

The plant discharges into tributaries of the Pascagoula River, one of the last free-flowing river systems in the contiguous United States. The Pascagoula River basin empties into the Gulf of Mexico, supporting critical habitats for fish, shellfish, and migratory birds. The region's coastal wetlands and estuaries are ecologically sensitive, relying on balanced freshwater inflows and nutrient management to maintain biodiversity and water quality.