BAGNES_PROFRAY Wastewater Treatment Plant, Villette, Valais, Switzerland

BAGNES_PROFRAY is a wastewater treatment plant located in Villette, within the Val de Bagnes region of Valais, Switzerland. The plant serves a population of approximately 15,523 and has a designed capacity of 1.00, reflecting its role in managing municipal wastewater for this Alpine community. As a Swiss facility, the plant operates under the Federal Water Protection Act (GSchG) and the Waters Protection Ordinance (GSchV), which mandate appropriate treatment levels based on the sensitivity of receiving waters. For agglomerations of this size, secondary treatment with nutrient removal is typically required to protect downstream ecosystems. The treated effluent is discharged into the local watershed, which drains into the Dranse River, a tributary of the Rhône. The Rhône flows through Lake Geneva and eventually into the Mediterranean Sea. This Alpine environment supports diverse aquatic life and is ecologically sensitive due to seasonal flow variations and glacial influences.

The plant's discharge enters the Dranse River, which flows into the Rhône River. The Rhône passes through Lake Geneva before reaching the Mediterranean Sea. This watershed supports diverse aquatic ecosystems, including fish species adapted to cold, oxygen-rich waters. The Alpine setting means the river experiences significant seasonal flow changes from snowmelt and glacial runoff, requiring careful management of nutrient loads to prevent eutrophication.