CHATEAU D OEX_LECHERETTE Wastewater Treatment Plant, Château-d'Oex, Vaud, Switzerland

CHATEAU D OEX_LECHERETTE is an advanced wastewater treatment plant located in the alpine village of Château-d'Oex, within the canton of Vaud, Switzerland. The facility serves a small population of 661 residents, reflecting the rural and mountainous character of the region. It operates with a designed capacity of 1000 m³/day and currently discharges 300.04 m³/day of treated wastewater. As an advanced treatment plant, it goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for facilities discharging into sensitive alpine watersheds. Switzerland's water protection legislation, the Waters Protection Act (GSchG), requires stringent treatment standards to safeguard the country's lakes and rivers. Plants of this scale are expected to meet high effluent quality standards to protect downstream ecosystems. The plant's treated effluent is discharged into local watercourses that feed into the Sarine River, a tributary of the Aare River, which ultimately flows into the Rhine River and the North Sea. The alpine watershed is ecologically sensitive, supporting diverse aquatic life and providing critical habitat for species adapted to cold, oxygen-rich waters. The advanced treatment helps minimize nutrient loading and protects the pristine mountain environment.

The plant discharges into the local watershed of the Sarine River, which flows into the Aare River, a major tributary of the Rhine River. The Rhine ultimately drains into the North Sea. The alpine region is ecologically sensitive, with cold, oxygen-rich streams that support trout and other cold-water species. Advanced treatment reduces nutrient pollution, protecting downstream aquatic habitats and maintaining water quality for recreational use.