Overview
VAL DE REUIL Lery wastewater treatment plant serves Alizay, Normandie, France, with a population equivalent of 29,650. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale
VAL DE REUIL Lery is a wastewater treatment plant located in Alizay, within the Eure department of Normandie, France. The facility serves a population equivalent of 29,650, classifying it as a medium-sized agglomeration under European Union regulations. Its location in the Seine River basin places it within a densely populated and industrially active region. As a French plant serving over 10,000 people, VAL DE REUIL Lery is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary biological treatment as a minimum. For agglomerations between 10,000 and 150,000 population equivalent, the directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's operational details, including specific treatment processes and capacity, are not publicly available, but the regulatory framework ensures compliance with national and European standards. The treated effluent from VAL DE REUIL Lery is discharged into the local water system, which ultimately drains into the Seine River and then into the English Channel. The Seine basin supports diverse aquatic life and is an important ecological corridor. The plant plays a key role in protecting downstream water quality, particularly given the proximity to the Seine estuary and its sensitive marine environment.
Environmental context
VAL DE REUIL Lery discharges into the Seine River basin, which flows through Normandie and into the English Channel. The Seine estuary is a critical habitat for migratory fish species such as salmon and eel, and supports a variety of birdlife. The plant's location inland, more than 50 km from the coast, reduces direct marine impact, but its effluent contributes to the overall nutrient load in the river system, which can affect downstream coastal waters. Effective treatment is essential to prevent eutrophication in the estuary and maintain the ecological balance of the Seine basin.
Frequently asked questions
VAL DE REUIL Lery is located in Alizay, in the Eure department of Normandie, France. The plant serves the surrounding urban area.
The plant serves a population equivalent of 29,650, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is discharged into the local water system, which flows into the Seine River and eventually reaches the English Channel.
As a French plant serving over 10,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and, if needed, more stringent treatment in sensitive areas.
For agglomerations of this size, French plants typically employ secondary biological treatment, such as activated sludge, to meet EU standards. Additional nutrient removal may be required if the receiving waters are sensitive.
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