Station d epuration - Saint-Valérien-de-Milton, Québec Wastewater Treatment Plant

Station d epuration is a municipal wastewater treatment facility located at 1512 Chemin de Roxton in Saint-Valérien-de-Milton, Québec, Canada. The plant serves a small population of 454 residents in this rural community within the Les Maskoutains regional county municipality. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under Canada's federal wastewater regulations, specifically the Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act. These regulations set national effluent quality standards for carbonaceous biochemical oxygen demand, suspended solids, and residual chlorine. For small communities like Saint-Valérien-de-Milton, secondary treatment is the typical minimum requirement to protect receiving waters. The treated effluent from Station d epuration is discharged into local streams that drain into the Yamaska River watershed. The Yamaska River flows northward through the Montérégie region and eventually empties into the St. Lawrence River near Sorel-Tracy. This watershed supports diverse aquatic life and is important for regional agriculture and recreation.

The plant discharges into the Yamaska River basin, which flows into the St. Lawrence River, one of North America's largest and most ecologically significant waterways. The Yamaska River watershed is characterized by agricultural land use and supports fish species such as yellow perch and northern pike. The St. Lawrence River downstream is a critical migratory corridor for fish and birds, and its estuary supports diverse marine life. Protecting water quality in this basin is essential for maintaining ecosystem health and recreational uses.