La Couture-Boussey Wastewater Treatment Plant, Normandy, France

The La Couture-Boussey wastewater treatment plant is located in the commune of La Couture-Boussey in the Eure department of Normandy, France. It serves a population of approximately 2,955 residents, classifying it as a small agglomeration under French regulations. The plant is situated inland, away from coastal areas, and treats wastewater from the local community. The facility employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,200 m³/day and a current discharge volume of 527 m³/day, the plant operates well below its capacity, indicating room for future growth. The treatment process ensures high-quality effluent before discharge. The treated effluent is discharged into local watercourses that eventually flow into the Seine River basin, which drains into the English Channel. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from nutrient pollution and organic matter, supporting biodiversity in the region.

The plant discharges into local streams that are part of the Seine River basin, which ultimately flows into the English Channel. The Seine basin supports diverse aquatic life and is an important ecological corridor for migratory fish species. Advanced treatment at this plant helps reduce nutrient loads, protecting downstream water quality and preventing eutrophication in sensitive estuarine and coastal environments.