Landes Genusson Les Wastewater Treatment Plant, Les Landes-Genusson, France

Landes Genusson Les is a municipal wastewater treatment plant located in Les Landes-Genusson, a commune in the Vendée department of Pays de la Loire, France. The plant serves a population of approximately 2,158 people, classifying it as a small agglomeration under French and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The plant has a designed capacity of 1,250 cubic meters per day and currently treats an average daily flow of about 385 cubic meters, indicating ample reserve capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Vendée River and the Bay of Biscay. The plant plays a key role in protecting the region's water quality, supporting both ecological health and downstream uses such as agriculture and recreation.

The plant discharges into the local river system within the Vendée basin, which flows into the Bay of Biscay on the Atlantic coast. This watershed supports diverse aquatic life and is important for regional agriculture. The secondary treatment process helps reduce organic pollutants and nutrients, mitigating eutrophication risks in downstream coastal waters.