Overview
Saint Jean de Maurienne wastewater treatment plant serves the commune of Saint-Jean-de-Maurienne in the Auvergne-Rhône-Alpes region of France, treating wastewater for approximately 21,000 residents.
The Saint Jean de Maurienne wastewater treatment plant is located in the commune of Saint-Jean-de-Maurienne, within the Savoie department of the Auvergne-Rhône-Alpes region in southeastern France. Situated in the Maurienne valley along the Arc River, the plant serves a population of around 21,000 people, making it a medium-sized agglomeration under French and EU classifications. As a French wastewater facility serving a population between 10,000 and 100,000, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum standard. French regulations transpose this directive through the Code de l'Environnement, and plants of this scale are typically subject to national performance standards and periodic monitoring by local water agencies. The plant discharges treated effluent into the Arc River, a tributary of the Isère River, which flows into the Rhône River and eventually reaches the Mediterranean Sea. The Maurienne valley is an alpine region with sensitive aquatic ecosystems, and the plant's operation is critical for protecting water quality in the Arc River and downstream environments.
Environmental context
The plant discharges into the Arc River, which flows through the Maurienne valley before joining the Isère River. The Isère then meets the Rhône River, which empties into the Mediterranean Sea. The alpine watershed supports diverse aquatic life and is an important corridor for migratory fish species. Protecting water quality in this system is essential for maintaining ecological balance in the Rhône basin.
Frequently asked questions
The plant is located at Rue de l'Arc in Saint-Jean-de-Maurienne, Savoie, Auvergne-Rhône-Alpes, France.
The plant serves approximately 21,031 people, classifying it as a medium-sized agglomeration under EU standards.
Treated effluent is discharged into the Arc River, which flows into the Isère River and then the Rhône River, ultimately reaching the Mediterranean Sea.
As a French plant serving over 10,000 people, it falls under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment. French national regulations implement this directive through the Code de l'Environnement.
For agglomerations between 10,000 and 100,000 population equivalent, the EU directive requires secondary treatment. In sensitive areas, tertiary treatment may be required. French plants typically achieve biological treatment with nutrient removal where needed.
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