Degrilleur Cale Seche Wastewater Treatment Plant, Tadoussac, Quebec

Degrilleur Cale Seche is a municipal wastewater treatment plant located on Rue de la Cale Sèche in Tadoussac, Quebec, Canada. It serves a small community of 776 residents in the Côte-Nord region, operating under the regulatory framework of the Canadian Environmental Protection Act and provincial Quebec standards. The plant provides secondary treatment, which is appropriate for its small population size. Canadian wastewater facilities of this scale are typically regulated by the provincial Ministry of the Environment and subject to effluent quality standards under the Fisheries Act. The plant discharges treated wastewater 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 migratory fish and marine mammals, making effective treatment essential for protecting downstream ecosystems.

The plant discharges into the St. Lawrence River estuary, a critical habitat for beluga whales, seals, and numerous fish species. The estuary is a major migratory corridor for birds and supports rich biodiversity. Treated effluent enters the river, which flows into the Gulf of St. Lawrence and then the Atlantic Ocean, making the plant's secondary treatment important for minimizing nutrient and pollutant loads in this sensitive coastal environment.