BAZET nouvelle station Wastewater Treatment Plant, Bazet, Occitanie

BAZET nouvelle station is a municipal wastewater treatment facility located in Bazet, a commune in the Hautes-Pyrénées department of Occitanie, southern France. The plant serves a population of approximately 1,700 residents, placing it in the small agglomeration category under French regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. Its designed capacity is 2,500 m³ per day, with an average daily discharge volume of 303.28 m³, indicating ample reserve capacity for future growth. Treated effluent from the plant is discharged into local waterways that ultimately drain into the Adour River basin, flowing westward to the Bay of Biscay. The receiving environment supports diverse aquatic life and is part of a regional hydrological network that includes the Gave de Pau river system.

The plant discharges into the Adour River basin, which flows through the Pyrénées-Atlantiques and Landes departments before reaching the Bay of Biscay. This watershed supports a variety of freshwater species and is an important corridor for migratory fish such as salmon and eels. The region's agricultural and urban runoff can affect water quality, making the plant's secondary treatment essential for protecting downstream ecosystems.