Les Bordes Wastewater Treatment Plant, Bonnée, Centre-Val de Loire, France

Les Bordes is a wastewater treatment plant located in Bonnée, within the Centre-Val de Loire region of France. It serves the local community with a population equivalent of 1,490, operating under the French regulatory framework that implements the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant's designed capacity is 2,700 m³ per day, and it currently treats an average daily flow of approximately 266 m³, indicating ample reserve capacity. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU directive for agglomerations of this size. This level of treatment typically includes nutrient removal (nitrogen and phosphorus) and possibly disinfection, ensuring high-quality effluent before discharge. As a small agglomeration (under 2,000 population equivalent), the plant benefits from tailored regulatory oversight by French water agencies. The treated effluent is discharged into the local watershed, which ultimately drains into the Loire River, one of France's major rivers. The Loire basin is ecologically significant, supporting diverse aquatic life and providing water for agriculture and drinking. The advanced treatment at Les Bordes helps protect downstream water quality in this sensitive river system.

The plant discharges into the Loire River basin, which flows through central France before reaching the Atlantic Ocean. The Loire is a vital ecological corridor, supporting species such as Atlantic salmon and European eel. Advanced treatment at Les Bordes reduces nutrient loads, helping to prevent eutrophication in downstream waters and maintaining the ecological balance of this important river system.