MAURON Wastewater Treatment Plant, Mauron, Bretagne, France

The MAURON wastewater treatment plant is located in the commune of Mauron, within the Morbihan department of Bretagne, France. It serves a population of approximately 2,670 residents, placing it in the small-to-medium agglomeration category under French and EU regulations. The plant is situated inland, away from coastal areas, and its operations are part of the regional water management infrastructure. 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. Its designed capacity is 4,700 m³/day, while current discharge volume averages 476.32 m³/day, indicating significant spare capacity. The facility is operated as part of the municipal wastewater system, likely under the oversight of the local water authority or an intercommunal syndicate. The treated effluent is discharged into local watercourses that eventually drain into the Atlantic Ocean via the Vilaine River basin or smaller coastal rivers. The region's watershed supports diverse aquatic life and is important for agriculture and tourism. Advanced treatment helps protect downstream water quality, particularly in sensitive areas such as the Gulf of Morbihan and the Ria d'Etel, which are ecologically significant for migratory birds and marine species.

The plant discharges into the local watershed, which is part of the broader Vilaine River basin or adjacent coastal catchments in southern Bretagne. These waters flow into the Atlantic Ocean, with the Gulf of Morbihan and the Ria d'Etel being notable downstream environments. The area supports diverse aquatic ecosystems, including migratory fish species and coastal wetlands, making advanced treatment important for maintaining water quality and ecological balance.