Cunter Sot Got Wastewater Treatment Plant, Surses, Graubünden

Cunter Sot Got is a wastewater treatment plant located in Cunter, part of the Surses municipality in the canton of Graubünden, Switzerland. The plant serves a population of around 6,853 residents in this Alpine valley community, situated at an elevation of about 1,200 meters above sea level. As a Swiss plant serving a medium-sized agglomeration, it operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which mandates advanced treatment to protect sensitive Alpine waters. Swiss regulations require tertiary treatment for plants in this population range, including phosphorus removal, to prevent eutrophication in receiving waters. The plant's treated effluent discharges into the local watershed, which drains into the Julia River (a tributary of the Albula River), then into the Hinterrhein, and ultimately into the Rhine River. The Rhine flows through Germany and the Netherlands before reaching the North Sea. The Alpine environment is ecologically sensitive, supporting diverse aquatic life and serving as a critical water source for downstream ecosystems.

The plant's treated effluent enters the local stream network, which flows into the Julia River, a tributary of the Albula River. The Albula joins the Hinterrhein, which forms part of the Rhine River basin. The Rhine ultimately discharges into the North Sea. The Alpine watershed is ecologically sensitive, with cold, oxygen-rich waters that support trout and other cold-water species. Nutrient loading from wastewater must be carefully managed to prevent algal blooms and maintain water quality in this pristine mountain environment.