Overview
MEZIERES SUR SEINE wastewater treatment plant serves approximately 7,650 people in Mézières-sur-Seine, Île-de-France, France. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of thi
The MEZIERES SUR SEINE wastewater treatment plant is located in Mézières-sur-Seine, a commune in the Yvelines department of Île-de-France, France. It serves a population of approximately 7,650 people, classifying it as a small to medium agglomeration under EU regulations. The plant is situated near the Seine River, which is the primary water body in the region. 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 (PE) between 2,000 and 10,000. For plants serving around 7,650 people, secondary treatment is the standard, ensuring that organic matter and suspended solids are effectively removed before discharge. The regulatory framework ensures compliance with national and EU standards. The treated effluent from the plant is discharged into the Seine River, which flows through Paris and eventually into the English Channel via the Seine estuary. The Seine basin supports diverse aquatic life and is an important ecological corridor in northern France. The plant plays a key role in protecting water quality in this densely populated and industrialized region, reducing nutrient and pollutant loads that could otherwise impact downstream ecosystems.
Environmental context
The plant discharges into the Seine River, which flows northwest through the Paris Basin and into the English Channel at the Seine estuary near Le Havre. The Seine supports a variety of fish species, including pike and perch, and its estuary is a critical habitat for migratory birds. The plant's operations help mitigate eutrophication risks in the river and downstream coastal waters.
Frequently asked questions
The plant is located in Mézières-sur-Seine, a commune in the Yvelines department of Île-de-France, France. Its address is near the Autoroute de Normandie, in the La Grande Rue area.
The plant serves approximately 7,650 people, classifying it as a small to medium agglomeration under EU regulations.
The treated effluent is discharged into the Seine River, which flows through the Paris Basin and eventually into the English Channel.
As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size.
Under the EU Urban Waste Water Treatment Directive, plants serving between 2,000 and 10,000 population equivalent are required to have secondary treatment, which removes organic matter and suspended solids.
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