LARUNS COMMUNALE is an advanced wastewater treatment plant in Laruns, Nouvelle-Aquitaine, France, serving approximately 2,883 people. It discharges treated water into the local river system within the Gave de Pau watershed.
LARUNS COMMUNALE is an advanced wastewater treatment facility located in Laruns, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France. The plant serves a population of around 2,883, typical of a small mountain community in the Pyrenees. Its location near the Gave d'Ossau river places it within a sensitive alpine environment where water quality is critical for both ecology and tourism. As an advanced treatment plant, LARUNS COMMUNALE goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus), which is particularly important in catchments that drain into sensitive areas. The plant's designed capacity of 2,850 m³/day and current discharge volume of 514.32 m³/day indicate it operates well below capacity, allowing for future growth or seasonal peaks from tourism. The treated effluent is discharged into the Gave d'Ossau, a tributary of the Gave de Pau, which flows into the Adour River and eventually reaches the Bay of Biscay (Atlantic Ocean). This river system supports diverse aquatic life, including migratory fish species such as salmon and trout. The plant's advanced treatment helps protect downstream water quality in a region valued for its natural heritage and outdoor recreation.
Environmental context
The plant discharges into the Gave d'Ossau, part of the Adour-Garonne basin, which flows through the Pyrenees to the Bay of Biscay. This watershed supports sensitive aquatic ecosystems, including habitats for migratory fish like Atlantic salmon and European eel. The advanced treatment level helps mitigate nutrient loading in a region where tourism and agriculture place additional pressure on water resources.
Frequently asked questions
LARUNS COMMUNALE is located in Laruns, a commune in the Pyrénées-Atlantiques department of Nouvelle-Aquitaine, southwestern France, near the Gave d'Ossau river.
The plant serves approximately 2,883 people, typical of a small mountain community in the Pyrenees.
The treated effluent is discharged into the Gave d'Ossau river, which flows into the Gave de Pau, then the Adour River, and ultimately reaches the Bay of Biscay.
The plant provides advanced treatment, which includes nutrient removal beyond secondary treatment, in line with EU standards for sensitive areas.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size require secondary treatment. LARUNS COMMUNALE exceeds this with advanced treatment, likely due to the sensitivity of the receiving water body.