ST SAUVEUR AQUALLINE Wastewater Treatment Plant, Saint-Sauveur, France

ST SAUVEUR AQUALLINE is a wastewater treatment plant located in Saint-Sauveur, a commune in the Isère department of the Auvergne-Rhône-Alpes region, southeastern France. The plant serves a population of around 14,100 residents, placing it in the medium agglomeration category under French and EU regulations. As a French 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 plant is situated inland, more than 50 km from the coast, and its treated effluent is discharged into the local watershed, which ultimately flows into the Rhône River basin. The receiving water body is part of the Rhône River system, one of Europe's major rivers that drains into the Mediterranean Sea. The plant plays a key role in protecting the water quality of the local streams and the downstream Rhône, supporting aquatic ecosystems and recreational uses.

The plant discharges into the local watershed within the Rhône River basin, which flows southward through the Auvergne-Rhône-Alpes region and eventually into the Mediterranean Sea via the Camargue delta. The Rhône supports diverse aquatic life and is an important migratory corridor for fish species such as the European eel and Atlantic salmon. The plant's treatment helps maintain water quality in this ecologically significant river system.