L'Isle-Jourdain Wastewater Treatment Plant, Nouvelle-Aquitaine, France

The L'Isle-Jourdain wastewater treatment plant is located in the commune of L'Isle-Jourdain, within the Vienne department of Nouvelle-Aquitaine, France. It serves a population of approximately 2,010 residents, classifying it as a small agglomeration under French and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 2,500 m³ per day, with an average daily discharge volume of 358.58 m³, indicating significant spare capacity. Treated effluent is discharged into the local watershed, which ultimately drains into the Vienne River, a tributary of the Loire. The Loire basin is ecologically significant, supporting diverse aquatic life and migratory fish species. The plant's operation helps protect downstream water quality in this sensitive river system.

The plant discharges into the Vienne River basin, which flows into the Loire River, one of France's longest rivers. The Loire estuary and its floodplain are ecologically sensitive areas that support diverse aquatic habitats, including migratory fish like Atlantic salmon and European eel. The plant's secondary treatment reduces organic pollution and nutrient loads, helping to maintain water quality in this important river system.