Overview
Bordeaux Léognan Moulin de la Tour is a municipal wastewater treatment plant serving approximately 15,745 people in Léognan, Nouvelle-Aquitaine, France. It operates under the EU Urban Waste Water Treatment Directive.
Bordeaux Léognan Moulin de la Tour is a municipal wastewater treatment plant located in Léognan, a commune in the Gironde department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of approximately 15,745, placing it in the medium agglomeration category under EU classification. As a French facility, the plant is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The treated effluent is discharged into the local watershed, which ultimately drains into the Garonne River and then the Gironde estuary, a major Atlantic coastal ecosystem. The plant plays a key role in protecting the water quality of this sensitive estuarine environment, supporting aquatic life and recreational uses downstream.
Environmental context
The plant discharges into the Garonne River basin, which flows into the Gironde estuary, one of Europe's largest estuaries. This estuary supports diverse aquatic life, including migratory fish species such as salmon and sturgeon. The area is ecologically sensitive due to its role as a nursery for marine species and its importance for bird migration. Protecting water quality here is critical for maintaining the health of the downstream Atlantic coastal ecosystem.
Frequently asked questions
The plant is located at Chemin du Moulin de Renaud, La Marque, in the commune of Léognan, within the Bordeaux metropolitan area, Gironde department, Nouvelle-Aquitaine, France.
The plant serves approximately 15,745 people, classifying it as a medium-sized agglomeration under EU wastewater treatment regulations.
Treated effluent is discharged into the local watershed, which flows into the Garonne River and eventually the Gironde estuary, a major Atlantic coastal ecosystem.
As a French plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which mandates secondary treatment for agglomerations of this size and may require tertiary treatment if the receiving waters are sensitive.
Under the EU UWWTD, plants serving between 10,000 and 150,000 population equivalents are required to have secondary treatment (biological treatment). In sensitive areas, additional nutrient removal may be required.
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