CULLEN STP - Advanced Wastewater Treatment Plant in Sarepta, Louisiana

CULLEN STP is a municipal wastewater treatment facility located in Sarepta, Webster Parish, Louisiana, United States. The plant serves a population of approximately 1,625 residents, reflecting its role as a small-scale treatment facility within the region. The plant employs advanced treatment processes, ensuring a high level of effluent quality before discharge. With a design capacity of 647.30 thousand cubic meters per day and an actual discharge volume of 643.52 thousand cubic meters per day, the facility operates near its designed capacity. As a US-based plant, it operates under the Clean Water Act, with National Pollutant Discharge Elimination System (NPDES) permits issued by the Louisiana Department of Environmental Quality, which set strict limits on pollutant discharges. The treated effluent is discharged into a local water body, ultimately contributing to the Red River basin and the Mississippi River watershed. This region supports diverse aquatic life and is part of a larger drainage system that flows into the Gulf of Mexico, making effective treatment critical for downstream water quality.

The plant discharges into a local water body within the Red River basin, which flows into the Mississippi River and eventually the Gulf of Mexico. This watershed supports diverse aquatic ecosystems, including fish and migratory bird species. The advanced treatment level helps protect downstream water quality in this ecologically sensitive region.