Ribeauville Wastewater Treatment Plant, Ribeauville, Grand Est, France

The Ribeauville wastewater treatment plant is located at 2 Rue des Hirondelles in Ribeauville, a commune in the Haut-Rhin department of the Grand Est region, France. The facility serves a population of approximately 13,000, placing it in the medium agglomeration category under EU classification. As a French plant serving over 10,000 people, it is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment (biological treatment) for all discharges from agglomerations of this scale. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas, such as those prone to eutrophication. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Rhine River via the Ill River. The Rhine basin is a major European waterway supporting diverse aquatic ecosystems and providing drinking water for millions. The plant plays a key role in protecting the water quality of this transboundary river system.

The Ribeauville plant discharges into the Ill River, a tributary of the Rhine. The Rhine basin is ecologically significant, supporting migratory fish species such as salmon and eel, and providing habitat for diverse aquatic life. Downstream, the Rhine flows through several countries before reaching the North Sea, making nutrient and pollutant control critical for both local and international water quality.