SEMUR EN AUXOIS Wastewater Treatment Plant, Millery, Bourgogne-Franche-Comté

The SEMUR EN AUXOIS wastewater treatment plant is located in Millery, a commune in the Côte-d'Or department of Bourgogne-Franche-Comté, France. It serves a population of approximately 4,417 people, classifying it as a small agglomeration under French regulations. The plant is situated in a rural inland area, away from coastal zones. The facility 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 10,000 m³/day and a current discharge volume of 787.98 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Seine River basin, contributing to the water quality of the region. The plant's advanced treatment helps protect downstream ecosystems, including the Seine estuary and the English Channel, by reducing nutrient loads and pollutants.

The plant discharges into the local watershed, which is part of the Seine River basin. The Seine flows northward through Paris and into the English Channel, supporting diverse aquatic life and providing water for agriculture and industry. Advanced treatment at this plant helps minimize eutrophication risks in the river and its estuary, preserving water quality for downstream communities and habitats.