ESSARTS La Croix Blanche Wastewater Treatment Plant, Essarts-en-Bocage, Pays de la Loire

ESSARTS La Croix Blanche is an advanced wastewater treatment plant located in the Lotissement du Petit Bourbon area of Les Essarts, within the commune of Essarts-en-Bocage in the Vendée department of Pays de la Loire, France. The plant serves a population of approximately 2,915 residents and has a designed capacity of 3,150 cubic meters per day, with a current discharge volume of 520.03 cubic meters per day. As an advanced treatment facility, the plant goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants discharging into sensitive environments under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, and France's national regulations often mandate advanced treatment in sensitive areas like the Loire basin. The plant's treated effluent is discharged into local watercourses that ultimately drain into the Atlantic Ocean via the Vendée River or nearby coastal systems. The Pays de la Loire region features a mix of agricultural and natural landscapes, and the plant plays a key role in protecting downstream aquatic ecosystems from nutrient pollution and organic matter.

The plant discharges into the local watershed of the Vendée region, which flows toward the Atlantic Ocean. The area includes sensitive coastal zones and estuaries that support diverse aquatic life, including migratory fish species. Advanced treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in downstream waters.