SAINT GEORGES DU BOIS ETIVAL LES LEMANS Wastewater Treatment Plant, Étival-lès-le-Mans, France

The SAINT GEORGES DU BOIS ETIVAL LES LEMANS wastewater treatment plant is located in Étival-lès-le-Mans, within the Pays de la Loire region of France. It serves a population of 4,250, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from coastal areas, and treats municipal wastewater from the local community. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 4,000 m³/day and currently discharges an average of 758.19 m³/day, indicating significant spare capacity for future growth or seasonal variations. The treated effluent is discharged into a local watercourse that eventually drains into the Sarthe River, a tributary of the Loire River. The Loire River is one of France's longest rivers and flows into the Atlantic Ocean. The plant's advanced treatment helps protect the ecological health of the Sarthe and Loire rivers, which support diverse aquatic life and are important for regional biodiversity.

The plant discharges into a local watercourse that flows into the Sarthe River, a major tributary of the Loire River. The Loire River basin is ecologically significant, hosting diverse fish species and migratory birds. The advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream waters, including the Loire estuary and the Bay of Biscay.