Overview
L'Isle-Adam wastewater treatment plant serves approximately 17,567 people in Val-d'Oise, France. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The L'Isle-Adam wastewater treatment plant is located in L'Isle-Adam, a commune in the Val-d'Oise department of northern France, about 30 km northwest of Paris. The plant serves a population of approximately 17,567 residents, classifying it as a medium-sized agglomeration under EU regulations. As a French wastewater facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent between 10,000 and 150,000. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant discharges treated effluent into the Oise River, a major tributary of the Seine. The Seine River basin is one of France's most important watersheds, supporting diverse aquatic life and providing drinking water for millions. The plant's operations help protect the Oise and Seine rivers from nutrient pollution and pathogens.
Environmental context
The plant discharges into the Oise River, which flows into the Seine River approximately 60 km downstream near Conflans-Sainte-Honorine. The Seine then continues to the English Channel via the Seine estuary near Le Havre. The Oise River supports a variety of fish species including pike and perch, and the Seine estuary is an important migratory corridor for birds and fish such as salmon and eel.
Frequently asked questions
The plant is located at Avenue Jules Dupre in L'Isle-Adam, a commune in the Val-d'Oise department of northern France, approximately 30 km northwest of Paris.
The plant serves approximately 17,567 residents, classifying it as a medium-sized agglomeration under EU regulations.
The plant discharges treated effluent into the Oise River, a major tributary of the Seine River, which eventually flows into the English Channel.
As a French wastewater facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of its size.
Under the EU Urban Waste Water Treatment Directive, plants serving between 10,000 and 150,000 population equivalent are required to have secondary treatment. If the receiving water is in a sensitive area, tertiary treatment may be required.
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