Station de traitement des eaux usees, Grande-Rivière, Quebec - Municipal Wastewater Treatment

Station de traitement des eaux usees is a municipal wastewater treatment plant serving the community of Grande-Rivière in the Gaspésie-Îles-de-la-Madeleine region of Quebec, Canada. The plant serves a population of 2,359 and is classified as a small agglomeration under Canadian wastewater regulations. As a Canadian facility, the plant operates under the federal Wastewater Systems Effluent Regulations (WSER) under the Fisheries Act, which sets national effluent quality standards for all wastewater systems serving over 100 people. For a plant of this scale, secondary treatment or equivalent is typically required to meet the regulations' objectives for carbonaceous matter, suspended solids, and residual chlorine. The plant's treated effluent is discharged into the local watershed, which ultimately flows into the Gulf of St. Lawrence. This region supports diverse marine life, including fish stocks and migratory birds, making proper wastewater treatment essential for protecting downstream ecosystems and coastal water quality.

The plant discharges into a watershed that drains into the Gulf of St. Lawrence, a major marine ecosystem in eastern Canada. The Gulf supports important fisheries, including lobster and groundfish, and serves as a migratory corridor for seabirds and marine mammals. The plant's location within 50 km of the coast means its effluent can influence nearshore water quality, particularly in the sensitive estuarine and coastal environments of the Gaspé Peninsula.