BRIENON SUR ARMANCON Wastewater Treatment Plant, Brienon-sur-Armançon, France

BRIENON SUR ARMANCON is an advanced wastewater treatment plant located in Brienon-sur-Armançon, in the Bourgogne-Franche-Comté region of France. The facility serves a population of approximately 2,442 residents and is situated along the Chemin de la Fontaine Saint-Loup, within the Yonne department. As a small agglomeration, the plant plays a key role in managing local wastewater for this rural community. 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 designed capacity of 4,000 m³/day and an average discharge volume of 435.65 m³/day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The plant's advanced treatment ensures high-quality effluent, reducing nutrient and pollutant loads. The treated effluent is discharged into the local watershed, which ultimately drains into the Armançon River, a tributary of the Yonne River, and then into the Seine River basin. This waterway supports diverse aquatic life and is part of the larger Seine-Normandy hydrographic region. The plant's advanced treatment helps protect downstream ecosystems, including sensitive areas in the Seine estuary and the English Channel.

The plant discharges into the Armançon River, a tributary of the Yonne River, which flows into the Seine River and eventually reaches the English Channel. The Seine basin supports diverse aquatic habitats and is ecologically sensitive due to agricultural runoff and urban pressures. Advanced treatment at this plant reduces nutrient loading, helping to mitigate eutrophication risks in downstream waters.