Overview
Châtillon d'Azergues wastewater treatment plant serves the commune of Châtillon in Auvergne-Rhône-Alpes, France. It treats wastewater for approximately 10,000 residents under EU regulatory standards.
The Châtillon d'Azergues wastewater treatment plant is located in the commune of Châtillon, within the Rhône department of Auvergne-Rhône-Alpes, France. Serving a population of around 10,000, the plant is part of the region's municipal wastewater infrastructure, ensuring that local sewage is treated before being released into the environment. As a facility serving a medium-sized agglomeration, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for communities of this scale. The directive aims to protect water quality across European water bodies, and the plant's compliance contributes to the broader environmental goals of the Rhône basin. The treated effluent from the plant is discharged into local waterways that eventually flow into the Saône River, a major tributary of the Rhône. The Rhône River then carries the water to the Mediterranean Sea. This downstream connection highlights the plant's role in safeguarding both regional aquatic ecosystems and the marine environment of the Gulf of Lion.
Environmental context
The plant discharges into the local hydrographic network that feeds the Saône River, which joins the Rhône River near Lyon. The Rhône flows southward to the Mediterranean Sea, supporting diverse aquatic life and important migratory fish species. The watershed is ecologically sensitive due to its role in connecting alpine and Mediterranean ecosystems, and the plant's treatment helps maintain water quality in this significant river basin.
Frequently asked questions
The plant is located in Châtillon, a commune in the Rhône department of the Auvergne-Rhône-Alpes region, France. Its address is D 385, Le Plan, La Colletière, Châtillon.
The plant serves approximately 9,980 people, classifying it as a medium-sized agglomeration under EU wastewater regulations.
Treated effluent from the plant is discharged into local streams that flow into the Saône River, a major tributary of the Rhône River, which ultimately reaches the Mediterranean Sea.
As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations with a population equivalent greater than 2,000.
For agglomerations of this size, French plants typically provide secondary treatment (biological treatment) as required by the EU directive, ensuring removal of organic matter and suspended solids before discharge.
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