BOURG DES COMPTES Wastewater Treatment Plant, Bourg-des-Comptes, Bretagne

BOURG DES COMPTES is a wastewater treatment plant located in Bourg-des-Comptes, a commune in the Ille-et-Vilaine department of Bretagne, France. The facility serves a population of approximately 2,770 and is designed with a capacity of 3,600 cubic meters per day. It operates under the French regulatory framework, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. With a daily discharge volume of about 494 m³, the facility operates well below its designed capacity, indicating room for future growth or seasonal variations. The treatment level meets the stringent requirements for sensitive areas under the EU directive. The treated effluent is discharged into the local watershed, which ultimately drains into the Vilaine River and then into the Atlantic Ocean. The plant plays a key role in protecting the water quality of the Vilaine basin, supporting aquatic life and downstream ecosystems. Its advanced treatment helps minimize nutrient loading and other pollutants, contributing to the ecological health of the region.

The plant discharges into the Vilaine River basin, which flows into the Atlantic Ocean via the Vilaine estuary. This watershed supports diverse aquatic habitats and is important for migratory fish species. The advanced treatment reduces nutrient and pollutant loads, helping to prevent eutrophication and maintain water quality in the downstream coastal zone.