Simmesport STP - Secondary Wastewater Treatment in Simmesport, Louisiana

Simmesport STP is a municipal wastewater treatment facility located in Simmesport, Avoyelles Parish, Louisiana. The plant serves a population of about 2,092 residents, providing secondary treatment to meet state and federal water quality standards. The plant operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 908.50 thousand gallons per day, the facility manages the community's wastewater needs. The treatment process ensures that effluent meets permit limits before discharge. The treated effluent is released into local receiving waters that drain into the Mississippi River basin. This region supports diverse aquatic life and is part of the larger Mississippi River watershed, which ultimately flows into the Gulf of Mexico. Proper treatment helps protect downstream ecosystems and water quality.

The plant discharges into local waterways that are part of the Mississippi River basin, one of the largest drainage systems in North America. The Mississippi River flows into the Gulf of Mexico, where nutrient pollution can contribute to hypoxic zones. Secondary treatment reduces organic pollutants and helps maintain water quality in the surrounding bayous and rivers, supporting aquatic habitats and recreational uses.