LAVIGNY Wastewater Treatment Plant, Cosges, Bourgogne-Franche-Comté, France

LAVIGNY is a wastewater treatment plant located in Cosges, within the Bourgogne-Franche-Comté region of France. It serves a population of approximately 1,800 people, classifying it as a small 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 designed capacity of 3,750 m³/day and a current discharge volume of 321.12 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. The treated effluent is discharged into local waterways that eventually drain into the Saône River, a major tributary of the Rhône. The Rhône flows into the Mediterranean Sea, making the plant's advanced treatment important for protecting downstream aquatic ecosystems and coastal water quality.

The plant discharges into a local watercourse that flows into the Seille River, a tributary of the Saône. The Saône joins the Rhône, which empties into the Mediterranean Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish. Advanced treatment helps minimize nutrient loading and protects downstream habitats from eutrophication.