Gilbert STP - Advanced Wastewater Treatment Plant in Gilbert, Louisiana

Gilbert STP is a municipal wastewater treatment facility located in Gilbert, Franklin Parish, Louisiana, United States. The plant serves a small population of 709 residents, reflecting the rural character of the area. It is situated inland, away from coastal zones, and operates under the regulatory framework of the US Clean Water Act. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a designed capacity of 567.81 cubic meters per day and an actual discharge volume of 355.83 cubic meters per day, the facility operates below its maximum capacity, indicating adequate headroom for future growth. As a small-scale plant, it is subject to state-level NPDES permitting requirements that enforce effluent limits tailored to local water quality standards. The treated effluent is discharged into a local watercourse that ultimately drains into the Mississippi River basin, a major hydrological system that flows into the Gulf of Mexico. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports the ecological health of the region's waterways.

The plant discharges into a tributary of the Mississippi River, which flows southward through Louisiana and into the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for fish and birds. Advanced treatment at Gilbert STP reduces nutrient and pollutant loads, helping to mitigate hypoxia in the Gulf and maintain water quality in local streams.