Junction City STP - Advanced Wastewater Treatment Plant in Junction City, Louisiana

Junction City STP (Sewage Treatment Plant) is a municipal wastewater facility located in Junction City, Union Parish, Louisiana. The plant serves a small population of 743 residents, reflecting its role in a rural community. It operates under the regulatory framework of the United States Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Its designed capacity is 227.12 million gallons per year, and it currently treats an annual discharge volume of 151.42 million gallons. This indicates the plant operates below its full capacity, allowing for future growth or seasonal variations. The treated effluent is discharged into a local water body, likely a tributary of the Ouachita River, which flows southward through Louisiana to the Mississippi River and ultimately the Gulf of Mexico. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into a local watercourse that drains into the Ouachita River basin, part of the larger Mississippi River watershed. The Ouachita River flows through forested and agricultural areas before joining the Mississippi River, which empties into the Gulf of Mexico. The advanced treatment at Junction City STP reduces nutrient loading, helping to prevent eutrophication in downstream lakes and coastal zones. The region supports diverse aquatic life, including fish and migratory birds, making water quality protection important.