BELLENTRE 2 Wastewater Treatment Plant, La Plagne-Tarentaise, France

BELLENTRE 2 is a municipal wastewater treatment plant located in the Alpine resort area of La Plagne-Tarentaise, within the Savoie department of the Auvergne-Rhône-Alpes region in France. The plant serves a population equivalent of 17,758, placing it in the medium agglomeration category under EU regulations. As a French facility, BELLENTRE 2 operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations between 10,000 and 150,000 population equivalent discharging into freshwater. The plant's treatment process and capacity are designed to meet these standards, ensuring compliance with national and EU water quality requirements. The treated effluent from BELLENTRE 2 is discharged into the local watershed, which ultimately drains into the Isère River and then the Rhône River, flowing to the Mediterranean Sea. The Alpine setting means the plant plays a key role in protecting sensitive mountain streams and downstream aquatic ecosystems from nutrient pollution.

BELLENTRE 2 discharges into the Isère River basin, a tributary of the Rhône River, which flows into the Mediterranean Sea. The Alpine watershed supports diverse aquatic life, including fish species such as brown trout and grayling, and is ecologically sensitive due to seasonal tourism pressures. The plant's treatment helps maintain water quality in this important recreational and ecological corridor.