Overview
Valence wastewater treatment plant serves approximately 147,000 people in Auvergne-Rhône-Alpes, France. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
The Valence wastewater treatment plant is a municipal facility located in Valence, Drôme, within the Auvergne-Rhône-Alpes region of France. It serves a population of approximately 146,589 people, classifying it as a large agglomeration under EU regulations. The plant is situated inland, near the Rhône River, and plays a key role in managing wastewater for the urban area. As a large agglomeration in France, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum, and tertiary treatment if the receiving water body is designated as a sensitive area. The Rhône River, into which the plant likely discharges, is a major watercourse that flows to the Mediterranean Sea, and such rivers often have sensitive area designations due to eutrophication risks. The plant's treated effluent ultimately reaches the Rhône River, which drains into the Gulf of Lion in the Mediterranean Sea. This downstream environment supports diverse aquatic life and is an important migratory corridor for fish species. The plant's operation helps protect water quality in the Rhône basin and the coastal marine ecosystem.
Environmental context
The Valence plant discharges into the Rhône River, one of Europe's major rivers, which flows southward through southeastern France and empties into the Gulf of Lion in the Mediterranean Sea. The Rhône basin supports a rich diversity of aquatic habitats and is an important corridor for migratory fish such as the European eel. The Mediterranean coastal zone near the river mouth is ecologically sensitive, with seagrass meadows and marine life that depend on good water quality. Effective wastewater treatment is essential to prevent nutrient overloading and protect these downstream ecosystems.
Frequently asked questions
The Valence wastewater treatment plant is located in Valence, Drôme, in the Auvergne-Rhône-Alpes region of France.
The plant serves approximately 146,589 people, classifying it as a large agglomeration under EU regulations.
The plant likely discharges treated effluent into the Rhône River, which flows south to the Mediterranean Sea.
As a French plant serving over 150,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment and potentially tertiary treatment if the receiving water is sensitive.
Under the EU directive, plants serving agglomerations over 10,000 people must have secondary treatment. For large agglomerations like Valence, tertiary treatment is often required to reduce nutrients, especially if discharging into sensitive areas like the Rhône River.
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