VANNES Le Prat Wastewater Treatment Plant, Theix-Noyalo, Bretagne

VANNES Le Prat is a wastewater treatment plant located in Theix-Noyalo, near Vannes in the Bretagne region of France. It serves a population of approximately 6,974 people, classifying it as a small agglomeration under EU guidelines. The plant is situated along the Route de Nantes in the Saint-Léonard area, part of the broader Vannes urban community. As a facility serving fewer than 10,000 people, VANNES Le Prat is subject to the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires appropriate treatment based on the sensitivity of the receiving environment. Plants of this scale typically employ secondary biological treatment to meet regulatory standards. The designed capacity is noted at 1.00, though the unit is unspecified, indicating a modest facility. The plant discharges treated effluent into the local watershed, which ultimately drains into the Gulf of Morbihan, a semi-enclosed marine inlet of the Bay of Biscay. This area supports diverse aquatic life and is ecologically sensitive due to its tidal flats and seagrass beds. The plant's operation helps protect the water quality of the Gulf, which is important for local fisheries and tourism.

The treated effluent from VANNES Le Prat enters the local drainage network, which flows into the Gulf of Morbihan, a coastal inlet connected to the Bay of Biscay and the Atlantic Ocean. The Gulf is a productive marine ecosystem with extensive tidal flats and seagrass meadows that support fish, shellfish, and migratory birds. The plant's discharge must meet standards to prevent nutrient enrichment and protect this sensitive coastal environment.