Municipalite de Ste Angele de Merici Wastewater Treatment Plant, Sainte-Angèle-de-Mérici, Québec

Municipalite de Ste Angele de Merici is a wastewater treatment facility located in Sainte-Angèle-de-Mérici, a municipality in the Bas-Saint-Laurent region of Québec, Canada. The plant serves a small population of 744 residents and operates with secondary treatment, which is appropriate for its scale and inland location. As a Canadian facility, the plant operates under provincial regulations enforced by the Ministère de l'Environnement et de la Lutte contre les changements climatiques (MELCC). Secondary treatment is the standard for municipal wastewater in Canada, ensuring removal of organic matter and suspended solids. The plant's discharge volume of 367.00 cubic meters per day reflects its small service area. The treated effluent is discharged into the local watershed, which ultimately drains into the St. Lawrence River via the Mitis River system. The St. Lawrence River is a major ecological corridor supporting diverse aquatic life and migratory fish species. The plant's secondary treatment helps protect downstream water quality in this sensitive estuarine environment.

The plant discharges into the Mitis River watershed, which flows into the St. Lawrence River estuary. The St. Lawrence River is a critical habitat for species such as the Atlantic sturgeon and beluga whale, and supports important fisheries. Secondary treatment reduces organic pollutants and suspended solids, helping maintain water quality in this ecologically significant river system.