SIVOMA SAINT JEAN D ARVES Wastewater Treatment Plant, Saint-Jean-d'Arves, France

The SIVOMA SAINT JEAN D ARVES wastewater treatment plant is located in Saint-Jean-d'Arves, a commune in the Savoie department of the Auvergne-Rhône-Alpes region, France. Situated in the French Alps, the plant serves a population of approximately 14,355 people, primarily from the ski resort area. The facility is part of the municipal wastewater infrastructure managed by the SIVOMA syndicate. As a plant serving an agglomeration of this size, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for populations between 10,000 and 150,000. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's treatment process and capacity details are not publicly available, but the regulatory framework ensures compliance with European standards. The treated effluent is discharged 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 alpine environment is ecologically sensitive, supporting diverse aquatic life and serving as an important corridor for migratory species. The plant plays a key role in protecting water quality in this mountainous region.

The plant discharges into the Arc River basin, which flows into the Isère River, a major tributary of the Rhône River. The Rhône eventually reaches the Mediterranean Sea. The alpine watershed is ecologically sensitive, supporting cold-water fish species and serving as a habitat for diverse aquatic invertebrates. The region's steep terrain and seasonal tourism increase the importance of effective wastewater treatment to prevent nutrient loading and protect downstream water quality.