Overview
Aulnay sur Mauldre wastewater treatment plant serves Maule, Île-de-France, France. It treats wastewater for approximately 10,000 people under the EU Urban Waste Water Treatment Directive.
The Aulnay sur Mauldre wastewater treatment plant is located in Maule, within the Île-de-France region of France. It serves a population of around 10,000, classifying it as a medium agglomeration under EU regulations. The plant is situated in the Yvelines department, near the Mauldre river valley. 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. The directive also requires appropriate treatment for sensitive areas, which may apply to the local watershed. The plant's design and operation align with national standards set by the French water agencies. The plant discharges treated effluent into the local water system, which ultimately drains into the Seine River basin. The Seine flows through Paris and into the English Channel, supporting diverse aquatic life and providing water for agriculture and recreation. The plant plays a key role in protecting the Mauldre River and downstream ecosystems from nutrient pollution.
Environmental context
The plant's treated effluent enters the Mauldre River, a tributary of the Seine. The Seine basin is a major hydrological system in northern France, supporting agriculture, industry, and biodiversity. Downstream, the Seine estuary and the English Channel receive the river's flow, which is critical for migratory fish species and coastal habitats. The plant's treatment helps reduce nutrient loads that could otherwise contribute to eutrophication in the Seine and marine environments.
Frequently asked questions
The plant is located in Maule, in the Yvelines department of Île-de-France, France. Its address is Ruelle du Gallien, Maule, 78580.
The plant serves approximately 10,000 people, classifying it as a medium-sized agglomeration under EU regulations.
The treated effluent is discharged into the local water system, which flows into the Mauldre River, a tributary of the Seine River.
As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size.
Under the EU UWWTD, plants serving 10,000 people typically require secondary treatment, which includes biological processes to remove organic matter and nutrients.
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