Saint-Aubin-du-Cormier Wastewater Treatment Plant, Brittany, France

The Saint-Aubin-du-Cormier wastewater treatment plant is located in the commune of Saint-Aubin-du-Cormier in the Brittany region of northwestern France. It serves a population of approximately 2,800 residents and is part of the municipal wastewater infrastructure managed by the local authority. The plant 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 3,700 m³/day and a current discharge volume of 499.52 m³/day, the facility operates well within its capacity. The treated effluent is discharged into local watercourses that ultimately drain into the Rance River basin and then into the English Channel. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the region, including the Rance estuary and coastal waters, which support diverse marine life and are important for local fisheries and tourism.

The plant discharges into the local watershed that feeds the Rance River, which flows into the English Channel. This coastal area supports diverse marine habitats and is important for migratory fish species. The advanced treatment ensures that nutrient and pollutant loads are minimized, protecting downstream water quality and the ecological balance of the estuary and coastal zone.