CHALLAND_SAINT_ANSELME Wastewater Treatment Plant, Challand-Saint-Anselme, Italy

The CHALLAND_SAINT_ANSELME wastewater treatment plant is located in the Tilly area of Challand-Saint-Anselme, within the Valle d'Aosta region of northern Italy. This facility serves a population of approximately 2,360 residents, reflecting its role as a small-scale municipal treatment plant in an Alpine valley setting. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. With a designed capacity of 2,400 cubic meters per day, the plant operates within its intended scale for the local community. Treated effluent from the plant is discharged into the local watershed, which ultimately drains into the Dora Baltea River, a major tributary of the Po River. The Po River flows eastward across northern Italy into the Adriatic Sea. The plant's operations help protect the sensitive Alpine aquatic ecosystems and downstream water quality in the Po basin.

The plant discharges into the Dora Baltea River, which flows through the Aosta Valley before joining the Po River near Turin. The Po River is Italy's longest river and drains into the Adriatic Sea, supporting diverse aquatic life and providing water for agriculture and industry. The Alpine watershed is ecologically sensitive, with cold-water fish species and riparian habitats that benefit from well-treated effluent.