SAINT MICHEL DE MAURIENNE Wastewater Treatment Plant, Saint-Martin-de-la-Porte, France

The SAINT MICHEL DE MAURIENNE wastewater treatment plant is located in Saint-Martin-de-la-Porte, within the Savoie department of the Auvergne-Rhône-Alpes region in France. The plant serves a population of approximately 34,876 people, classifying it as a medium-sized agglomeration under French and European regulations. As a French treatment facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant's specific treatment processes and capacity details are not publicly available, but it is expected to comply with national standards set by the French Ministry of Ecology. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Arc River, a tributary of the Isère River, and then into the Rhône River before reaching the Mediterranean Sea. The plant plays a key role in protecting the water quality of the Arc River and downstream ecosystems, including the Rhône delta.

The plant discharges into the Arc River, which flows through the Maurienne valley in the French Alps. The Arc River joins the Isère River, which then flows into the Rhône River, one of Europe's major rivers that empties into the Mediterranean Sea. The watershed supports diverse aquatic life and is an important corridor for migratory fish species. The plant's treatment helps maintain water quality in this alpine river system, which is sensitive to nutrient pollution and sediment runoff.