BOUTIGNY SUR ESSONNE Wastewater Treatment Plant, Boutigny-sur-Essonne, France

BOUTIGNY SUR ESSONNE is a wastewater treatment plant located in Boutigny-sur-Essonne, a commune in the Essonne department of Île-de-France, France. The plant serves a population of approximately 2,826 and has a designed capacity of 7,000 m³/day, with a current discharge volume of 504.15 m³/day. It provides advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive for agglomerations of this size. The plant operates under the French regulatory framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations (under 10,000 population equivalent), the directive requires appropriate treatment, and France typically mandates secondary or advanced treatment to protect sensitive water bodies. The advanced treatment level at this plant likely includes nutrient removal to safeguard the local aquatic environment. The treated effluent is discharged into the local watershed, which is part of the Seine River basin. The Essonne River, a tributary of the Seine, flows through the area and eventually drains into the English Channel. The plant plays a key role in protecting the water quality of the Essonne River and downstream ecosystems, including the Seine estuary and marine environment.

The plant discharges into the Essonne River, a tributary of the Seine, which flows through the Paris Basin and ultimately reaches the English Channel. The Seine basin supports diverse aquatic life and is an important ecological corridor. Advanced treatment helps reduce nutrient loads, preventing eutrophication in downstream waters and protecting the sensitive marine environment of the English Channel.