Etangs Aerés Pontbriand Wastewater Treatment Plant, Thetford Mines, Québec

Etangs Aerés Pontbriand is a municipal wastewater treatment facility located in the Pontbriand sector of Thetford Mines, Québec, Canada. The plant serves a small population of 290 residents and operates under secondary treatment standards, which is typical for small communities in the province. As a secondary treatment plant, it utilizes biological processes to reduce organic matter and suspended solids before discharge. Secondary treatment is the minimum required under Canadian federal and provincial regulations for discharges into freshwater environments. The treated effluent is released into a local watercourse that eventually drains into the Chaudière River watershed, which flows north to the St. Lawrence River. This river system supports diverse aquatic life and is an important ecological corridor in the region. The plant's location inland and away from coastal areas reduces direct marine impact.

The plant discharges into a local stream that is part of the Chaudière River basin, which flows into the St. Lawrence River. The St. Lawrence River is a major waterway that supports a wide range of fish species, including Atlantic sturgeon and American eel, and provides critical habitat for migratory birds. The watershed is ecologically sensitive, and secondary treatment helps protect water quality in this freshwater system.