ALLAIRE le couturier Wastewater Treatment Plant, Allaire, Bretagne

ALLAIRE le couturier is an advanced wastewater treatment plant located in Allaire, in the Bretagne region of northwestern France. The facility serves a population of approximately 1,047 residents and is part of the municipal infrastructure managed by the local authority. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,250 m³/day and a current discharge volume of 186.78 m³/day, the plant has ample capacity to accommodate future growth. The treated effluent is discharged into local waterways that flow into the Vilaine River basin and ultimately reach the Atlantic Ocean. The plant plays a key role in protecting the region's water quality, supporting aquatic life in the downstream rivers and coastal areas of southern Brittany.

The plant discharges into the local watershed that drains into the Vilaine River, which flows into the Atlantic Ocean near the Morbihan Gulf. This coastal region supports diverse marine and estuarine habitats, including important nursery areas for fish and migratory bird populations. Advanced treatment helps minimize nutrient loading and protects the ecological balance of the downstream environment.