Pontivy Signan Wastewater Treatment Plant, Saint-Thuriau, Brittany

Pontivy Signan is a wastewater treatment plant located in Saint-Thuriau, near Pontivy, in the Brittany region of France. It serves a population of approximately 59,716 people, classifying it as a medium-to-large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated along the Blavet River, which flows through the region. As a French facility serving over 15,000 population equivalent, Pontivy Signan is required to meet secondary treatment standards under the EU UWWTD. The plant's designed capacity is 1.00 cubic meter per second, indicating a substantial treatment capability. French plants of this scale typically employ biological treatment with nutrient removal to comply with national and EU regulations. The treated effluent from Pontivy Signan discharges into the Blavet River, which flows southward to the Atlantic Ocean via the Lorient harbor. The Blavet River supports diverse aquatic life and is an important waterway for the region. The plant's operations help protect the river's water quality and downstream ecosystems, including the coastal waters of the Bay of Biscay.

Pontivy Signan discharges treated wastewater into the Blavet River, a major watercourse in Brittany that flows approximately 150 kilometers from its source to the Atlantic Ocean near Lorient. The river supports a variety of fish species, including salmon and trout, and its estuary provides critical habitat for migratory birds. The plant's location inland, over 50 kilometers from the coast, reduces direct marine impact, but its effluent quality is crucial for maintaining the ecological health of the Blavet watershed and the downstream coastal zone.