MAUBOURGUET Wastewater Treatment Plant, Maubourguet, Occitanie

The MAUBOURGUET wastewater treatment plant is located in Maubourguet, a commune in the Hautes-Pyrénées department of Occitanie, southern France. The facility serves a population of approximately 2,300 residents, placing it in the small agglomeration category under French and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,330 m³/day and an average daily discharge volume of 410.32 m³, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into a local watercourse that ultimately drains into the Adour River basin, flowing westward toward the Bay of Biscay. The plant's advanced treatment helps protect the downstream aquatic environment, supporting biodiversity and water quality in the region's rivers and coastal waters.

The plant discharges into a tributary of the Adour River, which flows through the Gascogne region to the Bay of Biscay. The Adour basin supports diverse aquatic life, including migratory fish species such as salmon and eel. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream waters and protecting the ecological health of the river and its estuary.