Overview
Évry-les-Châteaux Grégy-sur-Yerre is an advanced wastewater treatment plant serving 2,490 people in Seine-et-Marne, France. It discharges treated water into the local watershed under EU regulatory standards.
Évry-les-Châteaux Grégy-sur-Yerre is an advanced wastewater treatment plant located in Évry-Grégy-sur-Yerre, Seine-et-Marne, France. The plant serves a population of 2,490, classifying it as a small agglomeration under EU regulations. It operates within the Île-de-France region, near the Yerres River, a tributary of the Seine. The plant employs advanced treatment processes, ensuring high-quality effluent. With a designed capacity of 3,000 cubic meters per day and a current discharge volume of 444.21 cubic meters per day, it operates well below capacity. As a French facility, it complies with the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size, but the plant exceeds requirements with advanced treatment. The treated wastewater is discharged into the Yerres River, which flows into the Seine River and ultimately reaches the English Channel. This contributes to protecting the Seine basin's water quality, supporting aquatic life and downstream ecosystems. The plant's advanced treatment helps reduce nutrient loads and pollutants, benefiting the regional environment.
Environmental context
The plant discharges into the Yerres River, a tributary of the Seine, which flows through Paris and into the English Channel. The Seine basin supports diverse aquatic life and is an important ecological corridor. Advanced treatment at this plant helps minimize nutrient pollution, protecting downstream water quality and habitats in the Seine estuary.
Frequently asked questions
The plant is located in Évry-Grégy-sur-Yerre, Seine-et-Marne, France, along Chemin des Vallées in the Les Grognets area.
The plant serves approximately 2,490 people, classifying it as a small agglomeration under EU regulations.
Treated wastewater is discharged into the Yerres River, a tributary of the Seine, which flows to the English Channel.
The plant provides advanced treatment, exceeding the EU Urban Waste Water Treatment Directive's secondary treatment requirement for agglomerations of this size.
As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for collection, treatment, and discharge.
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