Overview
Congis-sur-Thérouanne wastewater treatment plant serves 1,410 people in Seine-et-Marne, France. It provides secondary treatment with a designed capacity of 3,000 m³/day and discharges 251.54 m³/day.
The Congis-sur-Thérouanne wastewater treatment plant is located in the commune of Congis-sur-Thérouanne, within the Seine-et-Marne department of the Île-de-France region. It serves a population of approximately 1,410 residents, classifying it as a small agglomeration under French and EU regulations. The plant operates at secondary treatment level, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 3,000 m³ per day, with an actual discharge volume of 251.54 m³ per day, indicating ample reserve capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic ecosystems and providing drinking water for millions. The plant's secondary treatment helps protect downstream water quality and ecological health.
Environmental context
The plant discharges into the Thérouanne River, a tributary of the Marne River, which flows into the Seine River. The Seine basin is a major ecological corridor in northern France, supporting fish species such as pike and eel, and providing habitat for migratory birds. The plant's secondary treatment reduces organic pollutants and suspended solids, contributing to the overall health of the Seine estuary and the English Channel.
Frequently asked questions
The plant is located at Rue des Mottes, Congis-sur-Thérouanne, in the Seine-et-Marne department of the Île-de-France region, France.
The plant serves approximately 1,410 residents, classifying it as a small agglomeration under EU regulations.
The treated effluent is discharged into the Thérouanne River, a tributary of the Marne River, which flows into the Seine River and eventually the English Channel.
The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size.
The plant has a designed capacity of 3,000 m³ per day, with an actual discharge volume of 251.54 m³ per day, indicating significant reserve capacity.
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