Selongey Wastewater Treatment Plant, Selongey, France

The Selongey wastewater treatment plant is located in the commune of Selongey, within the Côte-d'Or department of Bourgogne-Franche-Comté, France. It serves a population of approximately 1,645 residents, making it a small-scale municipal facility. The plant is situated on Chemin de Layer, near the local urban area. 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. Its designed capacity is 3,700 m³/day, and it currently discharges an average of 293.47 m³/day of treated wastewater. The facility operates under French national regulations that implement the EU directive, ensuring high environmental standards. The treated effluent is discharged into local watercourses that eventually drain into the Seine River basin, contributing to the overall water quality of the region. The plant plays a key role in protecting the local aquatic environment and downstream ecosystems, including the Seine estuary and the English Channel.

The plant discharges into small streams that feed into the Tille River, a tributary of the Saône, which flows into the Rhône and eventually the Mediterranean Sea. The local watershed supports diverse aquatic life and is part of a region with agricultural and rural land use. The advanced treatment helps minimize nutrient and pollutant loads, safeguarding water quality in downstream rivers and the Mediterranean coastal zone.