DOMME Wastewater Treatment Plant, Cénac-et-Saint-Julien, Nouvelle-Aquitaine

The DOMME wastewater treatment plant is located in Cénac-et-Saint-Julien, within the Dordogne department of Nouvelle-Aquitaine, France. It serves a population of 2,120, classifying it as a small agglomeration under French and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the region's municipal wastewater infrastructure. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,000 m³/day and an actual discharge volume of 378.20 m³/day, the facility operates well below its capacity, indicating potential for future growth or seasonal variations. The advanced treatment level ensures high-quality effluent suitable for discharge into sensitive environments. The treated effluent is discharged into the local watershed, which ultimately drains into the Dordogne River and then into the Gironde estuary and the Atlantic Ocean. The plant plays a key role in protecting the water quality of the Dordogne River, a major river in southwestern France known for its ecological significance and recreational use. By providing advanced treatment, the facility helps maintain the health of downstream aquatic ecosystems.

The plant discharges into the Dordogne River basin, which flows into the Gironde estuary and then the Atlantic Ocean. The Dordogne River supports diverse aquatic life and is an important corridor for migratory fish species. Advanced treatment helps protect water quality in this ecologically sensitive watershed, which is also valued for tourism and agriculture.