Overview
MARY SUR MARNE wastewater treatment plant serves Lizy-sur-Ourcq, France. It treats wastewater for approximately 7,000 people, discharging into the local Seine-et-Marne watershed.
MARY SUR MARNE is a wastewater treatment plant located in Lizy-sur-Ourcq, within the Seine-et-Marne department of France. The facility serves a population of approximately 7,000 residents, operating as part of the municipal wastewater infrastructure for the area. As a French wastewater treatment plant, it operates under the European Union's Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires appropriate treatment before discharge into sensitive areas, which includes the Seine River basin. The plant's treated effluent is discharged into the local water system, which ultimately drains into the Seine River and then into the English Channel. This watershed supports diverse aquatic life and is an important ecological corridor in the Île-de-France region.
Environmental context
The plant discharges into the Seine River basin, which flows through Paris and into the English Channel. The Seine estuary is a critical habitat for migratory fish species such as salmon and eel, and the river supports a variety of freshwater ecosystems. The watershed is heavily influenced by agricultural and urban runoff, making proper wastewater treatment essential for water quality.
Frequently asked questions
The plant is located at Chemin de Villers lès Rigault, Lizy-sur-Ourcq, in the Seine-et-Marne department of France.
The plant serves approximately 7,000 people in the Lizy-sur-Ourcq area.
The plant discharges treated effluent into the local water system, which flows into the Seine River and eventually the English Channel.
As a French plant serving about 7,000 people, it falls under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size.
Under the EU directive, plants serving 2,000 to 10,000 population equivalents typically require secondary treatment, which involves biological processes to remove organic matter and nutrients.
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