AIRE SUR L ADOUR Wastewater Treatment Plant, Aire-sur-l'Adour, France

The AIRE SUR L ADOUR wastewater treatment plant is located in Aire-sur-l'Adour, a commune in the Landes department of Nouvelle-Aquitaine, southwestern France. The facility serves a population of approximately 5,750 people, classifying it as a small agglomeration under EU regulations. The plant is situated near the Adour River, a major watercourse in the region. As a French wastewater facility serving fewer than 10,000 population equivalents, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment based on the sensitivity of the receiving environment. For smaller agglomerations, secondary treatment is typically mandated unless the discharge is into a less sensitive area. It operates within France's national regulatory framework, which implements the directive through the French Water Law and local water agency oversight. The treated effluent from the plant is discharged into the local watershed, ultimately flowing into the Adour River. The Adour River runs through the Landes region and empties into the Bay of Biscay (Atlantic Ocean) near Bayonne. The river supports diverse aquatic life and is an important ecological corridor for migratory fish species such as salmon and eels. The plant plays a key role in protecting the water quality of the Adour basin and the downstream coastal environment.

The plant discharges into the Adour River basin, which flows through the Landes region and into the Bay of Biscay (Atlantic Ocean). The Adour River supports diverse aquatic ecosystems, including migratory fish like Atlantic salmon and European eel. The watershed includes sensitive habitats such as wetlands and riparian forests that benefit from effective wastewater treatment to maintain water quality and ecological balance.