ABIDOS INTERCOMMUNALE Wastewater Treatment Plant, Lacq, Nouvelle-Aquitaine

ABIDOS INTERCOMMUNALE is a wastewater treatment plant located in Lacq, within the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, France. It serves a population of approximately 3,120 people, classifying it as a small agglomeration under French regulations. The plant employs advanced treatment processes, ensuring a high level of pollutant removal. With a designed capacity of 3,800 m³/day and an actual discharge volume of 556.60 m³/day, the facility operates well below its capacity, indicating room for future growth. As a French plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size, but the plant exceeds requirements with advanced treatment. The treated effluent is discharged into the local watershed, which ultimately drains into the Gave de Pau river and then the Adour river before reaching the Bay of Biscay. This contributes to the protection of aquatic ecosystems in the Adour basin, a region known for its diverse freshwater habitats.

The plant discharges into the Gave de Pau river, a tributary of the Adour river, which flows into the Bay of Biscay. The Adour basin supports diverse aquatic life, including migratory fish species such as salmon and eels. The advanced treatment helps minimize nutrient and pollutant loads, protecting downstream water quality and ecological health.