VIODOS ABENSE DE BAS INTERCOMMUNALE Wastewater Treatment Plant, Viodos, France

VIODOS ABENSE DE BAS INTERCOMMUNALE is a municipal wastewater treatment plant located in Viodos, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of approximately 16,441, placing it in the medium agglomeration category under EU classification. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures compliance with national and EU standards. The plant discharges treated wastewater into local watercourses that ultimately flow into the Atlantic Ocean via the Adour River basin. The region's aquatic ecosystems benefit from the plant's treatment, which helps maintain water quality in the Gave d'Oloron and downstream environments. The plant plays a key role in protecting the ecological health of the surrounding watershed.

The plant discharges into the Gave d'Oloron, a tributary of the Adour River, which flows into the Bay of Biscay (Atlantic Ocean). The watershed supports diverse aquatic life, including migratory fish species such as salmon and eels. The plant's treatment helps prevent nutrient pollution and maintains the ecological balance of this important river system.