SAINT AVE Lesvellec Wastewater Treatment Plant, Saint-Avé, Brittany

SAINT AVE Lesvellec is a wastewater treatment plant located in Saint-Avé, a commune in the Morbihan department of Brittany, France. The plant serves a population of approximately 6,201 residents, classifying it as a small to medium agglomeration under EU regulations. Its address is at the Complexe sportif de Lesvellec, Allée du Bois, Lesvellec, Saint-Avé, Vannes, Morbihan, Brittany, 56890, France. As a French facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwaters and estuaries. The plant's treated effluent ultimately drains into the Gulf of Morbihan, a semi-enclosed marine basin connected to the Atlantic Ocean. The Gulf of Morbihan is an ecologically sensitive area supporting diverse marine life, including seagrass beds and migratory bird populations. The plant's proximity to the coast (within 50 km) underscores the importance of effective treatment to protect coastal water quality.

The plant discharges into the Gulf of Morbihan, a coastal inlet in southern Brittany that connects to the Atlantic Ocean via a narrow channel. The Gulf is a productive marine ecosystem with extensive seagrass meadows and supports a variety of fish, shellfish, and bird species. As a coastal water body, it is sensitive to nutrient inputs, making effective wastewater treatment critical for preventing eutrophication and maintaining ecological balance.