Ambert Wastewater Treatment Plant, Ambert | Auvergne-Rhône-Alpes, France

The Ambert wastewater treatment plant is located in the commune of Ambert, within the Puy-de-Dôme department of the Auvergne-Rhône-Alpes region in central France. The facility serves a population of approximately 5,500 residents and operates with advanced treatment processes to ensure high-quality effluent. As a municipal plant, it plays a key role in managing wastewater from the town and surrounding areas. The plant employs advanced treatment technologies, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 8,100 cubic meters per day and an average discharge volume of 985 cubic meters per day, the facility operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but Ambert exceeds these standards with its advanced level. Treated effluent from the plant is discharged into the local watercourse, which flows into the Dore River, a tributary of the Allier River, and eventually reaches the Loire River. The Loire basin supports diverse aquatic ecosystems and is an important ecological corridor in France. The plant's advanced treatment helps protect water quality in this sensitive watershed.

The plant discharges into the Dore River, a tributary of the Allier River, which flows into the Loire River, the longest river in France. The Loire basin is ecologically significant, supporting diverse fish populations and migratory species. Advanced treatment at the plant helps reduce nutrient loading, protecting downstream habitats from eutrophication.