Overview
MEREVILLE 2 is an advanced wastewater treatment plant in Le Mérévillois, France, serving a population of 2,380. It discharges 424.59 m³/day of treated effluent into the local watershed.
MEREVILLE 2 is an advanced wastewater treatment plant located in Le Mérévillois, in the Essonne department of northern France. The facility serves a population of approximately 2,380 residents, reflecting its role as a small-scale municipal treatment system within the Île-de-France region. As an advanced treatment plant, MEREVILLE 2 goes beyond secondary biological treatment to remove nutrients such as nitrogen and phosphorus, aligning with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. The plant has a designed capacity of 4,000 m³/day and currently treats an average daily flow of 424.59 m³/day, indicating significant reserve capacity. The treated effluent from MEREVILLE 2 is discharged into the local river system, which ultimately drains into the Seine River basin and flows toward the English Channel. The plant's advanced treatment helps protect downstream water quality in the Seine estuary and coastal waters, supporting aquatic life and reducing eutrophication risks.
Environmental context
MEREVILLE 2 discharges into the local watershed that feeds the Seine River, which flows through Paris and into the Seine Bay in the English Channel. The Seine estuary is an ecologically sensitive area that supports diverse aquatic life, including migratory fish species. Advanced nutrient removal at the plant helps mitigate eutrophication in the downstream marine environment.
Frequently asked questions
MEREVILLE 2 is located at Chemin de la Laiterie, Méréville, in the commune of Le Mérévillois, within the Essonne department of the Île-de-France region, France.
MEREVILLE 2 serves a population of approximately 2,380 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The plant discharges treated effluent into the local river system, which flows into the Seine River basin and ultimately reaches the English Channel.
MEREVILLE 2 provides advanced treatment, which includes nutrient removal (nitrogen and phosphorus) beyond secondary biological treatment, in line with EU requirements for sensitive areas.
Under the EU UWWTD, small agglomerations (under 10,000 population equivalent) like MEREVILLE 2 are required to provide appropriate treatment. The plant's advanced treatment exceeds the minimum secondary treatment standard, reflecting its location in a sensitive catchment area.
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