Scuol Ardez Wastewater Treatment Plant, Ardez, Graubünden

The Scuol Ardez wastewater treatment plant is located in Ardez, a village in the Engadin region of Graubünden, Switzerland. It serves a small population of 565 residents and operates under Swiss federal water protection regulations, which require appropriate treatment for all discharges into sensitive alpine watersheds. The plant provides secondary treatment, which is the standard biological treatment level for small agglomerations in Switzerland. Its designed capacity of 1,250 m³/day indicates it can handle peak flows from the local community. The plant discharges treated effluent into the local water system, contributing to the protection of the Inn River basin. The receiving water body ultimately flows into the Inn River, a major tributary of the Danube, which drains into the Black Sea. The alpine environment is ecologically sensitive, supporting diverse aquatic life and serving as an important corridor for migratory fish species.

The plant discharges into the Inn River catchment, which flows through the Engadin valley and eventually joins the Danube River, draining into the Black Sea. The alpine watershed is characterized by cold, oxygen-rich waters that support sensitive aquatic ecosystems, including brown trout and other cold-water species. The region's high tourism activity places seasonal stress on water resources, making effective wastewater treatment critical for maintaining water quality.