SESTRIERE_MOLINO Wastewater Treatment Plant, Sestriere, Piemonte

SESTRIERE_MOLINO is a municipal wastewater treatment plant located in Sestriere, a town in the Piemonte region of northwestern Italy. The plant serves a population of 2,469 and is situated in the Alpine environment of the Susa Valley, near the French border. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 3,000 m³/day, with an average daily discharge of 509 m³/day, indicating significant reserve capacity. The treated effluent is discharged into local watercourses that drain into the Dora Riparia river, a tributary of the Po River. The Po River flows eastward across northern Italy to the Adriatic Sea. The plant's operation helps protect the sensitive Alpine watershed and downstream ecosystems.

The plant discharges into the Dora Riparia river basin, which feeds into the Po River, Italy's longest river. The Po River delta and its wetlands are ecologically significant, supporting diverse aquatic life and migratory birds. The Alpine headwaters are sensitive to nutrient pollution, making secondary treatment essential for maintaining water quality in the Po River system.