Regie d assainissement des eaux de la Vallee du Richelieu - Mont-Saint-Hilaire, Quebec Wastewater Treatment Plant

The Regie d assainissement des eaux de la Vallee du Richelieu is a wastewater treatment plant located in Mont-Saint-Hilaire, Quebec, Canada. It serves a population of about 60,000 in the La Vallee-du-Richelieu region, part of the Monteregie administrative area. The plant is operational and plays a key role in managing municipal wastewater for this growing community. As a facility serving a medium-sized agglomeration, the plant is expected to meet treatment standards set by the Canadian Council of Ministers of the Environment (CCME) and Quebec's Ministere de l'Environnement et de la Lutte contre les changements climatiques. These regulations typically require secondary treatment or equivalent for plants of this scale, ensuring adequate removal of organic matter and suspended solids before discharge. The plant's treated effluent is discharged into the Richelieu River, a major tributary of the St. Lawrence River. The Richelieu River flows north from Lake Champlain to the St. Lawrence, supporting diverse aquatic life and providing recreational and economic value. The plant's operations help protect water quality in this important watershed, which ultimately drains into the St. Lawrence Estuary and the Gulf of St. Lawrence.

The plant discharges into the Richelieu River, which flows into the St. Lawrence River near Sorel-Tracy. The St. Lawrence River is a major waterway that drains into the Gulf of St. Lawrence, supporting a rich ecosystem including fish species like Atlantic sturgeon and American eel. The Richelieu River itself is ecologically sensitive, providing habitat for freshwater mussels and migratory birds. Effective wastewater treatment is crucial to prevent nutrient loading and contamination in this interconnected system.