Etang Mont Louis Wastewater Treatment Plant, Saint-Maxime-du-Mont-Louis, Quebec

Etang Mont Louis is a municipal wastewater treatment plant located on Avenue B in Saint-Maxime-du-Mont-Louis, Quebec, within the Gaspésie region. The plant serves a small population of 427 residents and operates under secondary treatment standards, which is typical for small communities in Canada. The plant is operational and discharges an average of 443 cubic meters of treated wastewater per day. As a secondary treatment facility, Etang Mont Louis provides biological treatment to reduce organic matter and suspended solids before discharge. Canadian wastewater regulations under the Wastewater Systems Effluent Regulations (WSER) require secondary treatment or equivalent for all municipal systems, ensuring compliance with national standards. The plant's small scale aligns with the regulatory framework for rural communities. The treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of St. Lawrence. The receiving environment supports diverse aquatic life and is part of the larger St. Lawrence River ecosystem, an important ecological corridor in eastern Canada. The coastal location necessitates careful management to protect marine habitats.

The plant discharges into a local watercourse that flows into the Gulf of St. Lawrence, a major marine ecosystem in eastern Canada. This coastal environment supports diverse fish species, marine mammals, and seabirds. The St. Lawrence River system is a critical migratory route for aquatic species, and the plant's secondary treatment helps reduce nutrient and pollutant loads to protect downstream water quality.