Overview
CHAVAGNE wastewater treatment plant in Chavagne, Bretagne, France, serves 3,700 people with advanced treatment. It discharges 660.07 m³/day and has a designed capacity of 5,000 m³/day.
The CHAVAGNE wastewater treatment plant is located in Chavagne, a commune in the Ille-et-Vilaine department of Bretagne, France. It serves a population of approximately 3,700 residents and operates with advanced treatment processes, ensuring high-quality effluent before discharge. As an advanced treatment facility, CHAVAGNE goes beyond secondary treatment to remove nutrients and other pollutants, aligning with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. The plant has a designed capacity of 5,000 m³/day and currently treats an average daily flow of 660.07 m³/day, indicating ample capacity for future growth. The treated effluent is discharged into local watercourses that ultimately drain into the Vilaine River basin and the Bay of Biscay. The plant plays a key role in protecting the region's water quality, supporting aquatic ecosystems and downstream uses such as recreation and agriculture.
Environmental context
The plant discharges into the Vilaine River basin, which flows into the Bay of Biscay on the Atlantic coast. This watershed supports diverse aquatic life and is important for migratory fish species. The advanced treatment helps minimize nutrient loading, protecting downstream estuaries and coastal waters from eutrophication.
Frequently asked questions
The CHAVAGNE plant is located at Le Buron, in the commune of Chavagne, near Rennes in the Ille-et-Vilaine department of Bretagne, France.
The plant serves approximately 3,700 residents in the Chavagne area.
The plant uses advanced treatment processes, which include nutrient removal beyond secondary treatment, to produce high-quality effluent.
The plant discharges into local streams that feed the Vilaine River basin, ultimately flowing into the Bay of Biscay, protecting downstream aquatic habitats.
As a plant serving a small agglomeration (under 10,000 people) in a sensitive area, the EU directive requires advanced treatment to reduce nutrients and protect water quality.
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