Overview
Cazaubon wastewater treatment plant in Occitanie, France, serves 4,400 people with secondary treatment. It discharges 784.95 m³/day and has a designed capacity of 7,000 m³/day.
The Cazaubon wastewater treatment plant is located in the Occitanie region of southern France, serving the commune of Cazaubon in the Gers department. This facility provides secondary treatment for a population of 4,400, typical for a small agglomeration in rural southwestern France. As a secondary treatment plant, Cazaubon meets the minimum requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations between 2,000 and 10,000 population equivalent. The plant has a designed capacity of 7,000 m³/day and currently discharges 784.95 m³/day, indicating significant reserve capacity for future growth. The treated effluent from Cazaubon is discharged into the local watershed, which ultimately drains into the Midouze River system, a tributary of the Adour River. The Adour flows into the Bay of Biscay on the Atlantic coast. The plant's inland location reduces direct marine impact, but its discharge contributes to the overall water quality of the Adour basin, which supports diverse aquatic life and agricultural water use.
Environmental context
The Cazaubon plant discharges into the Midouze River basin, part of the larger Adour River system that flows into the Bay of Biscay. The Adour estuary and coastal waters support important fisheries and migratory fish species such as salmon and eels. As a secondary treatment plant, it provides essential nutrient removal to protect downstream water quality in this ecologically sensitive region.
Frequently asked questions
The plant is located at 83 Route de Mont de Marsan, in the commune of Cazaubon, Gers department, Occitanie region, France.
The plant serves approximately 4,400 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into the local watershed, which flows into the Midouze River, a tributary of the Adour River, ultimately reaching the Bay of Biscay.
The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive for agglomerations of this size.
As a French wastewater treatment plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), transposed into French law, with oversight from the local water agency (Agence de l'Eau Adour-Garonne).
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