etangs Marquette Wastewater Treatment Plant, Baie-Comeau, Quebec

etangs Marquette is a wastewater treatment plant serving the community of Baie-Comeau, located in the Côte-Nord region of Quebec, Canada. The plant treats wastewater from approximately 5,723 residents, making it a small-to-medium scale facility within the municipal infrastructure of the area. As a Canadian plant, etangs Marquette operates under the federal Wastewater Systems Effluent Regulations (WSER) and provincial Quebec environmental regulations. These frameworks require secondary treatment or equivalent for most facilities, with effluent quality standards to protect receiving waters. The treated effluent from etangs Marquette is discharged into the St. Lawrence River estuary, a major water body that flows into the Gulf of St. Lawrence and ultimately the Atlantic Ocean. The estuary supports diverse aquatic life, including fish species such as Atlantic salmon and various migratory birds, making the plant's discharge quality important for local ecosystem health.

The plant discharges into the St. Lawrence River estuary, a dynamic and ecologically important water body that connects the Great Lakes to the Atlantic Ocean. The estuary supports a rich diversity of marine life, including fish, crustaceans, and migratory birds. Downstream, the Gulf of St. Lawrence provides critical habitat for marine mammals like whales and seals. The plant's location within 50 km of the coast means its effluent can influence coastal water quality, particularly in the sensitive estuarine environment.