AVALLON Moulin Mathey Wastewater Treatment Plant, Avallon, Bourgogne-Franche-Comté

AVALLON Moulin Mathey is an advanced wastewater treatment plant located in Avallon, in the Bourgogne-Franche-Comté region of France. The plant serves a population of approximately 4,412 people and has a designed capacity of 10,000 m³/day, with a current discharge volume of 787.09 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent French and EU standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, and advanced treatment is often mandated in sensitive areas to protect water quality. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Seine River basin and flows toward the English Channel. By employing advanced treatment, the plant helps protect downstream aquatic ecosystems and supports the ecological health of the region's rivers and coastal waters.

The plant discharges into the local watershed within the Seine River basin, which flows northward through Paris and into the English Channel. This region supports diverse aquatic life and is important for migratory fish species. Advanced treatment helps minimize nutrient loading, protecting downstream water quality and preventing eutrophication in sensitive estuarine and coastal environments.