Cabanac-et-Villagrains Wastewater Treatment Plant | Nouvelle-Aquitaine, France

The Cabanac-et-Villagrains wastewater treatment plant is located in the commune of Cabanac-et-Villagrains, within the Gironde department of Nouvelle-Aquitaine, France. This facility serves a population of approximately 1,077 residents, providing essential wastewater management for this rural community. The plant operates with secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity of 2,200 cubic meters per day indicates the plant is sized to accommodate future growth, with current discharge volumes well below this threshold. The treated effluent is discharged into the local watershed, which ultimately drains into the Garonne River and then the Gironde estuary, a major ecological corridor on the Atlantic coast. The plant's inland location reduces direct marine impact, but its proximity to the estuary means careful management is needed to protect downstream water quality.

The plant discharges into the local stream network that feeds the Garonne River, which flows into the Gironde estuary, the largest estuary in Western Europe. This estuary supports diverse aquatic life, including migratory fish species such as Atlantic salmon and European eel. The watershed is part of the Adour-Garonne basin, a region with significant agricultural activity, making nutrient management important for preventing eutrophication in downstream waters.