ST FELIX Wastewater Treatment Plant, Bloye, Auvergne-Rhône-Alpes

ST FELIX is an advanced wastewater treatment plant located in Bloye, in the Auvergne-Rhône-Alpes region of France. It serves a population of 2,819 and is part of the municipal infrastructure for the area near Annecy. The plant operates under French regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment for agglomerations of this size. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. Its designed capacity is 9,667 m³/day, and it currently discharges an average of 502.90 m³/day of treated wastewater. The plant is situated inland, more than 10 km from the coast, and its treated effluent is discharged into local water bodies that ultimately drain into the Rhône River basin. The receiving water body supports diverse aquatic life and contributes to the ecological health of the region. The plant's advanced treatment helps protect downstream water quality, particularly in sensitive areas where nutrient reduction is critical. The facility plays a key role in safeguarding the local watershed and the broader Rhône River ecosystem.

The treated effluent from ST FELIX enters local streams that flow into the Rhône River, which eventually reaches the Mediterranean Sea. The Rhône basin is ecologically significant, supporting diverse fish species and migratory birds. Advanced treatment at this plant helps reduce nutrient loading, protecting downstream water quality and aquatic habitats.