AGGLOMERATION DE BOUSSAC Wastewater Treatment Plant, Saint-Silvain-Bas-le-Roc, France

AGGLOMERATION DE BOUSSAC is a wastewater treatment plant located in the commune of Saint-Silvain-Bas-le-Roc, within the Creuse department of Nouvelle-Aquitaine, France. The facility serves a population of approximately 1,800 residents, placing it in the small agglomeration category under French and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 2,855 m³/day, with an actual discharge volume of 321.12 m³/day, indicating ample reserve capacity. As a French facility, it operates under the national regulatory framework that transposes EU directives, with permits issued by the local prefecture or water agency. The treated effluent is discharged into the local watershed, which ultimately drains into the Creuse River, a tributary of the Vienne River, and then into the Loire River before reaching the Atlantic Ocean. The plant plays a key role in protecting the water quality of these rivers and the downstream aquatic ecosystems.

The plant discharges into the Creuse River basin, which flows into the Vienne River, a major tributary of the Loire River. The Loire is one of France's longest rivers and supports diverse aquatic life, including migratory fish species such as Atlantic salmon and European eel. The advanced treatment level helps minimize nutrient and pollutant loads, protecting the ecological health of these water bodies and the downstream coastal zone of the Bay of Biscay.