Station d'épuration Saint-Benoît - Secondary Wastewater Treatment in Mirabel, Québec

Station d'épuration Saint-Benoît is a municipal wastewater treatment facility located in the Saint-Benoît sector of Mirabel, Québec, Canada. The plant serves a small population of 1,693 residents and operates under the regulatory framework of the Canadian Environmental Protection Act and Québec's provincial water quality standards. The plant provides secondary treatment, which is appropriate for its small scale and inland location. In Canada, secondary treatment is the standard for municipal wastewater to reduce organic matter and suspended solids. The plant discharges an average of 760 cubic meters per day of treated effluent. The treated effluent flows into local watercourses that are part of the broader Lake of Two Mountains and Ottawa River watershed, ultimately reaching the St. Lawrence River. This region supports diverse aquatic life and is important for recreational activities and drinking water sources downstream.

The plant discharges into the local watershed that drains into the Lake of Two Mountains, a widening of the Ottawa River near its confluence with the St. Lawrence River. This area supports fish species such as walleye and northern pike, and is a migratory corridor for waterfowl. The St. Lawrence River downstream is a major freshwater ecosystem that provides drinking water to millions and sustains commercial fisheries.