CHABLIS Wastewater Treatment Plant, Chablis, Bourgogne-Franche-Comté, France

The CHABLIS wastewater treatment plant is located in Chablis, a commune in the Yonne department of Bourgogne-Franche-Comté, France. It serves a population of around 32,500 people, classifying it as a medium-sized agglomeration under EU regulations. The plant is situated near the D 965 road in the Le Patis area, east of the town center. As a French wastewater facility, CHABLIS operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires more advanced treatment if the plant discharges into sensitive areas, such as those prone to eutrophication. The plant's treatment processes and capacity are designed to meet these regulatory standards, ensuring compliance with national and European water quality goals. The treated effluent from CHABLIS is discharged into the local watershed, which ultimately drains into the Seine River basin via the Yonne River. This river system supports diverse aquatic life and is an important water resource for the region. The plant plays a key role in protecting downstream water quality, including the Seine estuary and the English Channel, by reducing nutrient and pollutant loads.

The CHABLIS plant discharges into the Yonne River, a tributary of the Seine River, which flows through Paris and into the English Channel. The Seine basin is ecologically significant, supporting fish species such as salmon and eel, and is a major migratory corridor. The plant's operations help mitigate nutrient pollution that could otherwise contribute to eutrophication in the Seine estuary and coastal waters.