St Regis Wastewater Treatment Plant - Montérégie, Québec | Secondary Treatment Facility

St Regis Wastewater Treatment Plant is a municipal facility located in the Montérégie region of Québec, Canada, serving a population of 1,336. The plant provides secondary treatment, a standard level for small communities in the province, ensuring compliance with environmental standards. As a secondary treatment plant, it employs biological processes to reduce organic matter and suspended solids. In Québec, such plants are regulated under the provincial Environment Quality Act and must meet effluent standards set by the Ministère de l'Environnement et de la Lutte contre les changements climatiques. The treated effluent is discharged into local waterways, likely tributaries of the St. Lawrence River, which ultimately drains into the Gulf of St. Lawrence and the Atlantic Ocean. The plant plays a key role in protecting downstream aquatic ecosystems and supporting the region's water quality.

The plant discharges into a local watercourse within the St. Lawrence River basin, which flows into the Gulf of St. Lawrence. This watershed supports diverse aquatic life, including fish species such as Atlantic salmon and lake sturgeon. The secondary treatment helps reduce nutrient loading and organic pollution, safeguarding downstream habitats and recreational waters.