Etangs Aeres de Notre Dame de l'Ile Perrot - Wastewater Treatment Plant in Québec, Canada

Etangs Aeres de Notre Dame de l'Ile Perrot is a municipal wastewater treatment plant located in Notre-Dame-de-l'Île-Perrot, a town in the Montérégie region of Québec, Canada. The plant serves a population of about 5,300 people and is classified as a small agglomeration under Canadian wastewater regulations. As a small-scale facility, it is subject to the Canadian Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act, which sets national effluent quality standards for all wastewater systems serving over 100 people. The plant's treatment process is designed to meet these standards, ensuring compliance with federal requirements for carbonaceous matter, suspended solids, and residual chlorine. The plant discharges treated effluent into the local water system, which ultimately drains into the St. Lawrence River via the Ottawa River or Lake Saint-Louis. This watershed supports diverse aquatic life and is an important migratory corridor for fish species. The plant's operation helps protect downstream water quality in the St. Lawrence River ecosystem.

The plant discharges into the local watershed that flows into Lake Saint-Louis, a fluvial lake of the St. Lawrence River, and then into the St. Lawrence River itself. This area supports diverse aquatic habitats and is part of a major migratory route for fish such as the American eel and lake sturgeon. The St. Lawrence River is a critical freshwater resource for the region, and the plant's effluent management helps maintain water quality in this ecologically sensitive system.