LASALLE Wastewater Treatment Plant, Saint-Bonnet-de-Salendrinque, Occitanie

LASALLE is a wastewater treatment plant located in Saint-Bonnet-de-Salendrinque, a commune in the Gard department of Occitanie, southern France. The plant serves a population of approximately 2,500, reflecting its role in a small rural agglomeration. It is situated inland, away from coastal areas, and treats wastewater from the local community. 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. With a designed capacity of 3,000 m³ per day and an average discharge volume of 442 m³ per day, the facility operates well within its capacity, ensuring effective treatment of incoming wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Mediterranean Sea via the Gardon River and the Rhône River. The advanced treatment level helps protect the sensitive aquatic ecosystems of the region, including the Camargue delta and coastal lagoons, by reducing nutrient loads and pollutants.

The plant discharges into the Gardon River basin, a tributary of the Rhône River, which flows into the Mediterranean Sea. The downstream environment includes ecologically sensitive areas such as the Camargue, a vast wetland delta that supports diverse birdlife and aquatic species. Advanced treatment at this plant helps minimize nutrient pollution, protecting these habitats from eutrophication.