USINE D ePURATION DE VAUDREUIL DORION Wastewater Treatment Plant, Vaudreuil-Dorion, Quebec

USINE D ePURATION DE VAUDREUIL DORION is a municipal wastewater treatment plant located in Vaudreuil-Dorion, Quebec, Canada. The plant serves a population of approximately 34,634 residents in the Vaudreuil-Soulanges region of Montérégie. As an operational facility, it plays a key role in managing wastewater from this growing suburban community west of Montreal. In Quebec, wastewater treatment plants are regulated under the provincial Environment Quality Act and must meet effluent standards set by the Ministere de l'Environnement et de la Lutte contre les changements climatiques. For agglomerations of this size, secondary treatment is typically required to reduce organic matter and suspended solids before discharge. The plant's treatment process and capacity are managed to comply with these standards. The plant discharges treated effluent into the local watershed, which ultimately drains into the St. Lawrence River via the Ottawa River or Lake Saint-Louis. This water body supports diverse aquatic life and is an important migratory corridor for fish species. Proper treatment helps protect downstream ecosystems and recreational water uses in the region.

The plant's treated effluent enters the local drainage network, which flows into the St. Lawrence River via Lake Saint-Louis. The St. Lawrence River is a major waterway supporting diverse aquatic habitats and serves as a critical corridor for migratory fish such as American eel and lake sturgeon. Protecting water quality in this watershed is essential for maintaining ecological balance and supporting recreational activities.