Overview
CHAMOSON wastewater treatment plant serves Saint-Pierre-de-Clages in Valais, Switzerland, with a designed capacity of 1.00 and a population equivalent of 5,466.
The CHAMOSON wastewater treatment plant is located in Saint-Pierre-de-Clages, a village within the municipality of Chamoson in the Valais canton of Switzerland. It serves a population of approximately 5,466 people, placing it in the small agglomeration category under Swiss regulations. As a Swiss plant, it operates under the national Water Protection Act (Gewässerschutzgesetz), which mandates appropriate treatment for all discharges. For a facility of this scale, secondary treatment with nutrient removal is typically required to protect sensitive alpine water bodies. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River via the surrounding valley. The Rhône flows through Lake Geneva and continues to the Mediterranean Sea. The plant plays a key role in preserving water quality in the alpine region, supporting aquatic life and downstream ecosystems.
Environmental context
The plant discharges into the local tributaries of the Rhône River, which flows through the Valais region and into Lake Geneva before reaching the Mediterranean Sea. The alpine watershed is ecologically sensitive, supporting diverse aquatic species and serving as a critical corridor for migratory fish. Protecting water quality is essential for maintaining the health of these downstream environments.
Frequently asked questions
The CHAMOSON plant is located in Saint-Pierre-de-Clages, a village in the municipality of Chamoson, within the Valais canton of Switzerland.
The plant serves approximately 5,466 people, classifying it as a small agglomeration under Swiss water protection regulations.
Treated effluent from the plant is discharged into local watercourses that flow into the Rhône River, eventually reaching Lake Geneva and the Mediterranean Sea.
The plant operates under Switzerland's Water Protection Act (Gewässerschutzgesetz), which requires appropriate treatment levels to protect water bodies. For small agglomerations, secondary treatment with nutrient removal is typical.
For a plant of this size in Switzerland, secondary biological treatment with phosphorus removal is standard to meet the strict water quality standards of the alpine region.
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