Station d epuration Wastewater Treatment Plant, Sorel-Tracy, Quebec

Station d epuration is a municipal wastewater treatment plant located in Sorel-Tracy, Quebec, Canada. It serves a population of approximately 42,120 residents in the Montérégie region, situated along the St. Lawrence River. The plant is part of the province's wastewater infrastructure managed under Quebec's environmental regulations. As a plant serving a medium-sized agglomeration, it operates under Canada's federal and provincial wastewater regulations, including the Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act. These regulations mandate minimum effluent quality standards for carbonaceous matter, suspended solids, and chlorine residual. Plants of this scale in Quebec typically employ secondary treatment or equivalent to meet regulatory requirements. The plant's treated effluent is discharged into the St. Lawrence River, one of North America's major waterways. The St. Lawrence River flows northeast through Quebec and into the Gulf of St. Lawrence, eventually reaching the Atlantic Ocean. This water body supports diverse aquatic life, including fish species such as Atlantic sturgeon and American eel, and is an important migratory corridor for birds.

The plant discharges into the St. Lawrence River, which flows through the St. Lawrence Lowlands and drains into the Gulf of St. Lawrence, a large estuary connecting to the Atlantic Ocean. The river supports a rich ecosystem, including fish spawning grounds and migratory bird habitats. The plant's location in an urban-industrial area means its effluent quality is critical for maintaining the health of this major waterway.