SAINT DENIS LES BOURG Wastewater Treatment Plant, Saint-Rémy, Auvergne-Rhône-Alpes

The SAINT DENIS LES BOURG wastewater treatment plant is located in Saint-Rémy, within the Auvergne-Rhône-Alpes region of France. It serves a population of approximately 3,590 people, classifying it as a small agglomeration under French and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the municipal infrastructure managed by local authorities. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size discharging into freshwater. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 4,500 m³/day, with an average discharge volume of 640.45 m³/day, indicating it operates well below its capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River basin. The Rhône is a major European river that flows into the Mediterranean Sea. The plant's operations help protect the water quality of the surrounding streams and rivers, supporting aquatic life and downstream ecosystems in the region.

The plant discharges into the local watershed within the Rhône River basin, which flows southward through southeastern France and into the Mediterranean Sea. The Rhône basin supports diverse aquatic habitats and is an important migratory corridor for fish species. The plant's secondary treatment helps reduce nutrient and organic pollution, mitigating eutrophication risks in downstream water bodies.