Étang aéré de Dégelis Wastewater Treatment Plant, Dégelis, Québec

Étang aéré de Dégelis is a municipal wastewater treatment plant located in Dégelis, Québec, Canada. The plant serves a population of approximately 2,442 residents, making it a small-scale facility within the Bas-Saint-Laurent region. It is situated at 11 Avenue du Longeron in the Témiscouata area. As a Canadian wastewater facility, the plant operates under the federal Wastewater Systems Effluent Regulations (WSER) and provincial Québec environmental standards. For small agglomerations like Dégelis, secondary treatment is typically required to meet effluent quality standards. The plant uses an aerated lagoon system (étang aéré), which is common for small communities in Canada due to its cost-effectiveness and reliability. The treated effluent is discharged into the local watershed, which ultimately drains into the Saint Lawrence River via the Madawaska River and the Saint John River system. The Saint Lawrence River is a major ecological corridor supporting diverse aquatic life, including fish species such as Atlantic salmon and sturgeon. The plant's operation helps protect downstream water quality in this sensitive ecosystem.

The plant discharges into the Madawaska River watershed, which flows into the Saint John River and eventually reaches the Bay of Fundy. This region supports diverse aquatic habitats, including spawning grounds for Atlantic salmon and other migratory fish. The Saint John River is an important ecological corridor in eastern Canada, and the plant's treatment helps maintain water quality for downstream communities and ecosystems.