IZON VAYRES Wastewater Treatment Plant, Vayres, Nouvelle-Aquitaine

IZON VAYRES is a wastewater treatment plant located in Vayres, within the Gironde department of Nouvelle-Aquitaine, France. The facility serves a small population of 79 people, reflecting its role as a local municipal treatment unit in a rural or peri-urban setting. The plant provides 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 directive mandates secondary treatment for all discharges from agglomerations with a population equivalent above 2,000, and IZON VAYRES, serving fewer than 100 people, operates under national regulations that align with these standards. The plant has a designed capacity of 3,500 cubic meters per day, indicating significant headroom for future growth or seasonal variations. The treated effluent is discharged into the local watershed, which ultimately drains into the Dordogne River and then the Gironde estuary, a major Atlantic coastal ecosystem. 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 secondary treatment helps protect this sensitive downstream environment from organic pollution.

The plant discharges into the local water system that flows into the Dordogne River, a major tributary of the Gironde estuary. The Gironde estuary is a critical habitat for migratory fish and supports a rich diversity of aquatic species. Secondary treatment reduces organic load and suspended solids, helping to maintain water quality in this ecologically important estuary.