Saint-Loubès Wastewater Treatment Plant, Nouvelle-Aquitaine, France

The Saint-Loubès wastewater treatment plant is located in the commune of Saint-Loubès, part of the Bordeaux metropolitan area in the Gironde department of Nouvelle-Aquitaine, France. The facility serves a population of approximately 10,285, classifying it as a medium-sized agglomeration under European Union regulations. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent between 2,000 and 10,000 are required to have secondary treatment, while those above 10,000 may require more advanced treatment if discharging into sensitive areas. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar unit), indicating it is sized to handle the local wastewater load. The treated effluent from the plant is discharged into the local watershed, which ultimately drains into the Garonne River via the Dordogne or directly into the Gironde estuary. The Gironde estuary is the largest in Western Europe and supports diverse aquatic life, including migratory fish species such as salmon and sturgeon. The plant's operation contributes to protecting this ecologically important estuary from nutrient pollution and pathogens.

The Saint-Loubès plant discharges into the local river system that flows into the Garonne River and then the Gironde estuary, a major European estuary that empties into the Bay of Biscay (Atlantic Ocean). The estuary supports a rich ecosystem, including migratory fish and bird populations, and is sensitive to nutrient loading from upstream sources. Effective wastewater treatment is essential to maintain water quality in this dynamic coastal environment.