SOUILLY Wastewater Treatment Plant, Messy, Seine-et-Marne, France

SOUILLY is an advanced wastewater treatment plant located in Messy, Seine-et-Marne, France. It serves a population of approximately 5,167 people and is situated along the Canal de l'Ourcq. The plant is part of the municipal wastewater infrastructure for the area. The plant provides advanced treatment, which goes 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 5,400 m³/day and a current discharge volume of 921.78 m³/day, the facility operates well within its capacity. Advanced treatment typically includes nutrient removal to protect sensitive water bodies. The treated effluent is discharged into the Canal de l'Ourcq, which flows into the Marne River, a tributary of the Seine. The Seine ultimately drains into the English Channel. The plant's advanced treatment helps protect the local watershed and downstream ecosystems, including the Seine estuary and marine environment.

The plant discharges into the Canal de l'Ourcq, which connects to the Marne River and then the Seine River. The Seine flows through Paris and into the English Channel, supporting diverse aquatic life and providing water for human use. The advanced treatment at SOUILLY reduces nutrient loads, helping to prevent eutrophication in downstream waters.