Etangs aeres de Sayabec Wastewater Treatment Plant, Sayabec, Quebec

Etangs aeres de Sayabec is a wastewater treatment facility located at 23 Route Rioux in Sayabec, Quebec, within the La Matapedia region of Bas-Saint-Laurent. The plant serves a population of 1,664 and is currently operational, contributing to the management of municipal wastewater in this rural community. The plant operates under Canada's federal and provincial wastewater regulations, including the Quebec Environment Quality Act. For a community of this size, aerated lagoons (etangs aeres) are a common and effective treatment method, typically providing secondary-level treatment to meet provincial effluent standards. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Matapedia River and then into the Restigouche River, flowing into the Baie des Chaleurs and the Gulf of St. Lawrence. This downstream environment supports diverse aquatic life and is important for regional fisheries and recreational activities.

The plant's treated effluent enters the local drainage network, flowing into the Matapedia River, a tributary of the Restigouche River. The Restigouche River is a major salmon river that empties into the Baie des Chaleurs, an estuary of the Gulf of St. Lawrence. This watershed supports ecologically sensitive habitats, including spawning grounds for Atlantic salmon and other fish species, making proper wastewater treatment essential for maintaining water quality and ecosystem health.