Grand Cane STP - Secondary Wastewater Treatment Plant in Grand Cane, Louisiana

Grand Cane STP is a municipal wastewater treatment facility located on Peyton Street in Grand Cane, DeSoto Parish, Louisiana. The plant serves a small population of 191 residents, reflecting the rural character of the community. It operates under secondary treatment standards, which is the baseline requirement for municipal wastewater plants in the United States under the Clean Water Act. The plant has a designed capacity of 189.27 megaliters per year and currently discharges approximately 113.56 megaliters annually, indicating it operates below its full capacity. As a secondary treatment facility, it uses biological processes to remove organic matter and suspended solids, meeting typical effluent quality standards for small communities. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program administered by the Louisiana Department of Environmental Quality. The treated effluent from Grand Cane STP is discharged into local waterways that ultimately drain into the Red River basin. The Red River flows south through Louisiana to the Atchafalaya River and eventually into the Gulf of Mexico. The plant's operations help protect downstream water quality in this ecologically significant river system, which supports diverse aquatic life and provides habitat for migratory birds.

Grand Cane STP discharges into tributaries of the Red River, which flows through Louisiana and joins the Atchafalaya River before reaching the Gulf of Mexico. The Red River basin supports a variety of fish species and provides critical habitat for migratory waterfowl along the Mississippi Flyway. The plant's secondary treatment helps reduce nutrient loads and organic pollutants that could otherwise contribute to eutrophication in downstream waters.