GUEYDAN STP - Advanced Wastewater Treatment in Gueydan, Louisiana

GUEYDAN STP is a municipal wastewater treatment facility located in Gueydan, Vermilion Parish, Louisiana. The plant serves a small community of approximately 1,611 residents, providing essential sanitation services to this rural area in the southern United States. The plant employs advanced treatment processes, ensuring high-quality effluent before discharge. With a designed capacity of 757.08 volume units and a corresponding discharge volume, the facility operates efficiently to meet local wastewater treatment needs. As a US-based plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets strict limits on pollutant discharges. The treated effluent from GUEYDAN STP is discharged into local waterways that ultimately drain into the Gulf of Mexico via the Vermilion River and related coastal basins. The plant plays a key role in protecting downstream aquatic ecosystems, including sensitive coastal wetlands and estuarine habitats that support diverse fish and wildlife populations.

The plant discharges into the Vermilion River watershed, which flows through southern Louisiana and empties into Vermilion Bay, part of the larger Gulf of Mexico estuary system. This coastal region features extensive wetlands and marshes that provide critical habitat for migratory birds, fish, and shellfish. The advanced treatment level helps minimize nutrient and pollutant loads, protecting these ecologically sensitive waters from eutrophication and other impacts.