Overview
GANNAT wastewater treatment plant serves approximately 5,000 people in Gannat, Auvergne-Rhône-Alpes, France. It operates with advanced treatment and has a designed capacity of 9,950 m³/day.
The GANNAT wastewater treatment plant is located in Gannat, a commune in the Allier department of the Auvergne-Rhône-Alpes region in central France. The plant serves a population of approximately 5,000 residents, making it a small-scale municipal facility. It is situated inland, far from coastal areas. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant's designed capacity is 9,950 m³/day, and it discharges an average volume of 891.99 m³/day, indicating it operates well below its capacity. The treated effluent is discharged into a local watercourse that ultimately drains into the Allier River, a major tributary of the Loire River. The Loire basin is ecologically significant, supporting diverse aquatic life and migratory fish species. The advanced treatment helps minimize nutrient loading and protects downstream water quality in this important river system.
Environmental context
The plant discharges into a tributary of the Allier River, which flows into the Loire River, one of France's longest rivers. The Loire basin supports diverse aquatic ecosystems, including migratory fish such as Atlantic salmon and European eel. Advanced treatment at the plant reduces nutrient pollution, helping to protect downstream habitats and water quality in this ecologically sensitive river system.
Frequently asked questions
The GANNAT wastewater treatment plant is located in Gannat, a commune in the Allier department of the Auvergne-Rhône-Alpes region in central France.
The plant serves approximately 5,000 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into a local watercourse that flows into the Allier River, a tributary of the Loire River.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with EU requirements for sensitive areas.
Under the EU UWWTD, agglomerations of 5,000 population equivalent require at least secondary treatment. The GANNAT plant exceeds this with advanced treatment, likely due to the sensitivity of the receiving water body.
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