Etangs Aerés Omerville Wastewater Treatment Plant, Magog, Québec

Etangs Aerés Omerville is an operational wastewater treatment plant located in the Omerville sector of Magog, Québec, Canada. The plant serves a population of approximately 2,624 residents, placing it in the small-agglomeration category under Canadian wastewater management frameworks. It is situated inland, more than 50 km from the coast, and operates within the province's regulatory oversight. As a small-scale facility, the plant is expected to meet provincial treatment standards under Québec's Environment Quality Act, which typically requires secondary treatment or equivalent for municipal wastewater. The plant's design and operation align with the regulatory requirements for communities of this size in the region. The treated effluent from Etangs Aerés Omerville is discharged into the local water system, which ultimately drains into the St. Lawrence River via the Memphrémagog Lake and the Richelieu River. This watershed supports diverse aquatic life and is an important ecological corridor in the Estrie region. The plant plays a key role in protecting downstream water quality and the broader St. Lawrence ecosystem.

The plant discharges into the local watershed that flows into Lake Memphrémagog, a large freshwater lake in southern Québec. From there, water travels via the Magog River to the St. Lawrence River, one of North America's major waterways. The St. Lawrence River supports a rich diversity of fish, birds, and aquatic plants, and is a critical migratory route for species such as the American eel. Protecting water quality in this basin is essential for maintaining the ecological health of the lake and the downstream river system.