Villars-les-Dombes Wastewater Treatment Plant - Advanced Treatment in Auvergne-Rhône-Alpes

The Villars-les-Dombes wastewater treatment plant is located in the commune of Villars-les-Dombes in the Ain department of Auvergne-Rhône-Alpes, France. It serves a population of approximately 5,500 residents, classifying it as a small to medium agglomeration under French and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a design capacity of 6,000 m³/day and an average daily discharge of 981.19 m³, the facility operates well within its capacity, ensuring effective treatment of local wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River basin. The Dombes region is known for its numerous ponds and wetlands, which support diverse aquatic life and migratory birds. The plant's advanced treatment helps protect these sensitive ecosystems from nutrient pollution and other contaminants.

The plant discharges into the local watershed within the Rhône River basin, which flows south to the Mediterranean Sea. The Dombes region features a landscape of interconnected ponds and wetlands that provide critical habitat for waterfowl and amphibians. Advanced treatment at this facility reduces nutrient loads, helping to maintain water quality in these ecologically sensitive areas and downstream in the Rhône River.