AMBES Wastewater Treatment Plant, Ambès, Nouvelle-Aquitaine, France

The AMBES wastewater treatment plant is located in Ambès, a commune in the Gironde department of Nouvelle-Aquitaine, southwestern France. The facility serves a population of 3,636 and is situated near the confluence of the Garonne and Dordogne rivers, within the Bordeaux metropolitan area. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 3,000 m³/day and a current discharge volume of 648.66 m³/day, the plant operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), advanced treatment is required for discharges into sensitive areas, which is consistent with the plant's location in the Gironde estuary. The treated effluent is discharged into the Garonne River, which flows into the Gironde estuary and then the Atlantic Ocean. The estuary is a critical habitat for migratory fish such as salmon and eels, and the advanced treatment helps protect water quality in this ecologically sensitive area.

The plant discharges into the Garonne River, which joins the Dordogne to form the Gironde estuary, the largest estuary in Western Europe. This estuary supports diverse aquatic life, including migratory fish species, and is an important nursery for marine life. The advanced treatment ensures that nutrient and pollutant loads are minimized, protecting the downstream ecosystem and the Atlantic coastal waters.