Overview
CHATILLON SUR CHALARONNE Chef lieu is an advanced wastewater treatment plant in Clémenciat, Auvergne-Rhône-Alpes, France, serving 5,300 people with a designed capacity of 5,533 m³/day.
CHATILLON SUR CHALARONNE Chef lieu is a municipal wastewater treatment plant located in Clémenciat, a commune in the Ain department of Auvergne-Rhône-Alpes, France. The plant serves a population of approximately 5,300 and has a designed capacity of 5,533 cubic meters per day, with an average discharge volume of 945.51 cubic meters per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. This level of treatment is consistent with French and EU regulations for sensitive areas, ensuring high-quality effluent before discharge. The plant operates under the French water law framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC). The treated effluent is discharged into the local watershed, which ultimately drains into the Rhône River basin. The Rhône is one of Europe's major rivers, flowing into the Mediterranean Sea. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.
Environmental context
The plant discharges into the Chalaronne River, a tributary of the Saône River, which flows into the Rhône River and eventually reaches the Mediterranean Sea. The watershed supports diverse aquatic life and is part of a region with agricultural and ecological significance. Advanced treatment at this plant helps reduce nutrient loading, protecting downstream water bodies from eutrophication.
Frequently asked questions
The plant is located in Clémenciat, a commune in the Ain department of Auvergne-Rhône-Alpes, France, near the town of Châtillon-sur-Chalaronne.
The plant serves approximately 5,300 people, classifying it as a small to medium agglomeration under EU classification.
The treated effluent is discharged into the Chalaronne River, which flows into the Saône and then the Rhône River, eventually reaching the Mediterranean Sea.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with EU requirements for sensitive areas.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), transposed into French law. For a population of 5,300, secondary treatment is required, but advanced treatment is applied here, likely due to the sensitivity of the receiving water body.
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