Overview
Ormont-Dessous Le Sépey wastewater treatment plant in Vaud, Switzerland, serves 1,796 people with advanced treatment. It discharges 815.24 m³/day and has a designed capacity of 3,000 m³/day.
The Ormont-Dessous Le Sépey wastewater treatment plant is located in the municipality of Ormont-Dessous in the canton of Vaud, Switzerland. It serves a population of 1,796 residents in the alpine region of Le Sépey. The plant is situated near the Grande Eau river, which flows through the Rhône basin. The plant employs advanced treatment processes, meeting stringent Swiss water quality standards. With a designed capacity of 3,000 m³/day and an average discharge volume of 815.24 m³/day, it operates well within its capacity. Swiss regulations require advanced treatment for sensitive areas, and this plant's performance aligns with national goals for protecting water resources. The treated effluent is discharged into the local watershed, ultimately reaching the Rhône River and the Mediterranean Sea. The plant plays a crucial role in preserving the ecological health of the alpine streams and downstream aquatic habitats, supporting biodiversity in the region.
Environmental context
The plant discharges into the Grande Eau river, a tributary of the Rhône, which flows through the Swiss Alps into Lake Geneva and then the Mediterranean Sea. The alpine watershed supports sensitive aquatic ecosystems, including cold-water fish species and diverse macroinvertebrate communities. Advanced treatment ensures minimal nutrient and pollutant loading, protecting downstream water quality in this ecologically significant region.
Frequently asked questions
The plant is located in Le Sépey, part of the municipality of Ormont-Dessous, in the canton of Vaud, Switzerland. Its address is Chemin des Chenevières 19, 1863 Le Sépey.
The plant serves approximately 1,796 residents in the Ormont-Dessous area, including the village of Le Sépey.
The treated effluent is discharged into the Grande Eau river, a tributary of the Rhône, which flows through the Swiss Alps and eventually reaches the Mediterranean Sea.
The plant provides advanced treatment, which includes nutrient removal (nitrogen and phosphorus) in addition to secondary biological treatment, meeting Swiss standards for sensitive water bodies.
Switzerland enforces strict wastewater treatment standards under the Water Protection Act. Plants serving agglomerations of this size are required to achieve advanced treatment to protect alpine streams and downstream lakes.
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