ANDILLY 2 Wastewater Treatment Plant, Andilly-les-Marais, Nouvelle-Aquitaine, France

ANDILLY 2 is a municipal wastewater treatment plant located in Andilly-les-Marais, within the Nouvelle-Aquitaine region of western France. The plant serves a population of approximately 8,176 residents, classifying it as a small to medium agglomeration under EU regulations. Its location near the Atlantic coast places it in an environmentally sensitive area. As a French facility, ANDILLY 2 operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for collection and treatment based on population size and receiving water sensitivity. For agglomerations between 2,000 and 10,000 population equivalent, the directive typically requires secondary treatment, with more stringent requirements if discharging into sensitive areas. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar units), indicating a modest scale. The plant's treated effluent ultimately drains into the Atlantic Ocean via local waterways, contributing to the protection of coastal water quality. The surrounding region includes the Marais Poitevin marshlands and the Pertuis d'Antioche strait, which support diverse aquatic life and are important for migratory birds. Proper treatment helps mitigate nutrient loading and preserve the ecological balance of these coastal and marine environments.

ANDILLY 2 discharges into the local watershed that flows into the Atlantic Ocean near the Pertuis d'Antioche. This coastal area is ecologically sensitive, supporting diverse marine life and serving as a habitat for migratory birds. The plant's operation helps reduce nutrient pollution that could otherwise contribute to eutrophication in the nearby coastal waters and the broader Bay of Biscay.