IFFENDIC2 Wastewater Treatment Plant, Iffendic, Bretagne, France

IFFENDIC2 is a municipal wastewater treatment plant located in Iffendic, a commune in the Ille-et-Vilaine department of Bretagne, France. The plant serves a population of approximately 3,400 residents and is situated inland, more than 10 km from the coast but within 50 km of the coastline. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 4,000 m³/day and an actual discharge volume of 606.55 m³/day, the plant operates well below its capacity, indicating room for future growth. As a French facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas. The treated effluent is discharged into local watercourses that eventually drain into the Atlantic Ocean via the Vilaine River basin. The plant plays a key role in protecting the region's water quality, supporting aquatic ecosystems, and maintaining the ecological health of downstream environments.

The plant discharges into the local watershed, which is part of the Vilaine River basin. The Vilaine flows into the Atlantic Ocean via the Morbihan Gulf, an ecologically sensitive area that supports diverse aquatic life, including migratory fish species. The advanced treatment helps reduce nutrient loading, protecting downstream water quality and marine habitats.