Safiental Valendas Wastewater Treatment Plant - Graubünden, Switzerland

Safiental Valendas is a municipal wastewater treatment plant located in the village of Valendas, part of the Safiental municipality in the canton of Graubünden, Switzerland. The plant serves a small population of 187 residents, reflecting the rural and alpine character of the region. The facility provides secondary treatment, which is the standard biological treatment stage required under Swiss water protection regulations. With a designed capacity of 438 m³/day and a current discharge volume of 84.88 m³/day, the plant operates well below its capacity, indicating adequate headroom for seasonal variations or future growth. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhine River via the Vorderrhein. The Rhine is a major European waterway, and the plant's secondary treatment helps protect downstream water quality in this ecologically sensitive alpine environment.

The plant discharges into the local stream network that feeds the Vorderrhein, a headwater of the Rhine River. The Rhine flows through Switzerland, Germany, and the Netherlands before reaching the North Sea. The alpine watershed supports diverse aquatic life, including brown trout and other cold-water species, and is an important corridor for migratory fish. Secondary treatment reduces organic load and suspended solids, protecting the ecological integrity of this sensitive mountain stream system.