SADIRAC 2 Wastewater Treatment Plant, Sadirac, Nouvelle-Aquitaine

SADIRAC 2 is a wastewater treatment facility located in Sadirac, within the Gironde department of Nouvelle-Aquitaine, France. The plant serves a population of approximately 1,670 residents and has a designed capacity of 4,000 m³/day, with a current discharge volume of 297.93 m³/day. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive for agglomerations of this size. As a small agglomeration (under 2,000 population equivalent), French regulations under the directive mandate appropriate collection and treatment, and the advanced level here indicates a higher standard of pollutant removal. The treated effluent is discharged into local watercourses that ultimately drain into the Garonne River and the Gironde estuary, a major ecological zone supporting diverse aquatic life and migratory fish species. The plant's inland location, more than 10 km from the coast, reduces direct marine impact.

The plant discharges into the local watershed, which flows into the Garonne River and then the Gironde estuary, a dynamic coastal ecosystem. This estuary is a critical habitat for migratory fish such as salmon and eels, and supports rich birdlife. The advanced treatment helps protect these downstream environments from nutrient pollution and other contaminants.