Station d'epuration Terrebonne Mascouche - Terrebonne, Quebec Wastewater Treatment Plant

Station d'epuration Terrebonne Mascouche is a municipal wastewater treatment facility located in Terrebonne, Quebec, Canada. The plant serves a population of about 60,639 people, classifying it as a medium-sized agglomeration within the province's wastewater infrastructure. It is situated near the Mille-Îles River, which flows into the Rivière des Prairies and eventually the St. Lawrence River. As a Canadian plant operating in Quebec, the facility is subject to the provincial Regulation respecting wastewater treatment works (Q-2, r. 34) and the federal Fisheries Act. For a plant serving over 50,000 people, secondary treatment is typically required to reduce organic matter and suspended solids. The plant's operational status is confirmed as active, ensuring continuous treatment of municipal wastewater. The treated effluent is discharged into the Mille-Îles River, a key tributary of the St. Lawrence River. This water body supports diverse aquatic life and is part of the larger St. Lawrence River ecosystem, which drains into the Atlantic Ocean. The plant plays a crucial role in protecting water quality in the region, particularly for downstream communities and sensitive habitats.

The plant discharges into the Mille-Îles River, which flows into the Rivière des Prairies and then the St. Lawrence River, ultimately reaching the Atlantic Ocean. The St. Lawrence River is a major ecological corridor supporting fish species such as lake sturgeon and American eel. The plant's operations help maintain water quality in this sensitive watershed, which is important for both biodiversity and human use.