B 3 Clarke Wastewater Treatment Plant, Sept-Îles, Québec

B 3 Clarke is a municipal wastewater treatment facility located in the Clarke City area of Sept-Îles, Québec, Canada. It serves a small population of 350 residents, reflecting its role in a rural or suburban community within the Côte-Nord region. The plant is situated near the Écocentre on Chemin de l'Église in Val-Margueritte. The plant provides secondary treatment, which involves biological processes to reduce organic matter and suspended solids. As a small-scale facility in Canada, it operates under provincial and federal regulations, including the Canadian Environmental Protection Act and Québec's wastewater treatment standards. Secondary treatment is typical for plants of this size, ensuring compliance with effluent quality guidelines for discharge into sensitive environments. The treated wastewater is discharged into the local watershed, which ultimately drains into the Gulf of St. Lawrence, a major marine ecosystem. The plant's proximity to the coast (within 10 km) means its discharge can influence coastal water quality and marine life. The Gulf of St. Lawrence supports diverse aquatic species and is an important migratory corridor for fish and marine mammals.

The plant discharges into a watershed that flows into the Gulf of St. Lawrence, a large marine estuary connected to the Atlantic Ocean. This coastal environment supports diverse aquatic life, including fish, crustaceans, and marine mammals. The region's cold waters and seasonal ice cover influence ecological dynamics, and the plant's secondary treatment helps mitigate nutrient and pollutant loads that could affect coastal habitats and water quality.