SAINT SAUVEUR ROMAGNE Wastewater Treatment Plant, Romagné, Bretagne

SAINT SAUVEUR ROMAGNE is an advanced wastewater treatment plant located in Romagné, in the Bretagne region of France. It serves a population of approximately 2,530 people and has a designed capacity of 3,000 m³/day, with an average daily discharge volume of 451.35 m³. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but advanced treatment is often implemented in sensitive areas to meet stricter effluent standards. The treated wastewater is discharged into local watercourses that eventually drain into the Atlantic Ocean. The plant plays a key role in protecting the region's water quality, supporting aquatic life in the downstream rivers and coastal ecosystems of the Bay of Mont-Saint-Michel.

The plant discharges into local streams that flow into the Couesnon River, which empties into the Bay of Mont-Saint-Michel, a highly productive estuary and important migratory corridor for birds and fish. The advanced treatment helps reduce nutrient loading, protecting the bay's sensitive ecosystem from eutrophication.