Saint Thegonnec Ti Poullin Wastewater Treatment Plant - Advanced Treatment in Brittany

Saint Thegonnec Ti Poullin is an advanced wastewater treatment plant located in Saint-Thégonnec Loc-Eguiner, in the Brittany region of northwestern France. The plant serves a population of approximately 3,167 residents, classifying it as a small agglomeration under French and EU regulations. The facility employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for sensitive areas. With a designed capacity of 4,500 cubic meters per day and an actual discharge volume of 565 cubic meters per day, the plant operates well within its capacity, ensuring effective treatment of local wastewater. The treated effluent is discharged into the local watershed, which drains into the English Channel via the coastal zone near Morlaix. The plant's proximity to the coast (within 10 km) means its discharge contributes to the protection of marine water quality and the sensitive coastal ecosystems of the Brittany shoreline.

The plant discharges into the coastal watershed of the English Channel near Morlaix, Brittany. The receiving waters support diverse marine life and are part of a region known for its rich biodiversity, including important fish spawning grounds and migratory bird habitats. The advanced treatment helps minimize nutrient loading and protect the sensitive coastal environment from eutrophication.