ROSTRENEN PONT LATTEN Wastewater Treatment Plant, Rostrenen, Brittany

ROSTRENEN PONT LATTEN is an advanced wastewater treatment plant located in Rostrenen, a commune in the Côtes-d'Armor department of Brittany, France. The plant serves a population of approximately 2,884 residents, reflecting its role in managing municipal wastewater for this small agglomeration. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 3,000 m³/day and an actual discharge volume of 514.50 m³/day, the facility operates well within its capacity, ensuring effective treatment of local wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Atlantic Ocean via the Blavet River or nearby coastal rivers. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of Brittany, including rivers and estuaries that support diverse wildlife and are important for regional biodiversity.

The plant discharges into the local water system in the Blavet River basin, which flows southward to the Atlantic Ocean near Lorient. The region's rivers and estuaries support diverse aquatic life, including migratory fish species such as salmon and eels. Advanced treatment at this plant helps maintain water quality in these ecologically sensitive waterways.