LE FAOUET Steroulin Wastewater Treatment Plant, Saint-Fiacre, Bretagne

LE FAOUET Steroulin is a wastewater treatment plant located in Saint-Fiacre, near Le Faouët, in the Bretagne region of France. The facility serves a population of approximately 23,666, placing it in the medium agglomeration category under EU regulations. The plant is situated inland, away from the coast, and its operations are subject to French national water quality standards. As a plant serving a medium-sized agglomeration, it is expected to comply with the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment as a minimum. The plant likely employs conventional biological treatment methods common in French municipal systems. The plant discharges treated wastewater into local watercourses that drain into the broader watershed of the Blavet River or nearby coastal rivers in southern Brittany. The region is characterized by a temperate oceanic climate and supports diverse aquatic life. The receiving waters eventually flow into the Atlantic Ocean, contributing to the ecological health of the Bay of Biscay.

The plant's treated effluent enters local streams that are part of the Blavet River basin, which flows southward into the Atlantic Ocean near Lorient. The watershed supports a variety of freshwater species and is important for migratory fish such as salmon and eels. Downstream, the coastal waters of the Bay of Biscay are ecologically sensitive, hosting diverse marine habitats and fisheries. The plant's operations help protect these environments by reducing nutrient and pollutant loads.