etangs aeres trois pistoles Wastewater Treatment Plant, Trois-Pistoles, Quebec

The etangs aeres trois pistoles wastewater treatment plant is located in Trois-Pistoles, Quebec, Canada, along the south shore of the St. Lawrence River. It serves a population of approximately 3,801 residents in this small municipality within the Bas-Saint-Laurent region. The plant is operational and has a designed capacity of 1.00 million liters per day. As a Canadian facility in Quebec, the plant operates under provincial environmental regulations administered by the Ministere de l'Environnement et de la Lutte contre les changements climatiques (MELCC). For small agglomerations like Trois-Pistoles, typical treatment requirements include secondary treatment to protect receiving waters. It is expected to meet provincial standards for wastewater effluent quality. The plant discharges treated wastewater into the St. Lawrence River, a major waterway that flows into the Gulf of St. Lawrence and ultimately the Atlantic Ocean. The St. Lawrence River supports diverse aquatic life and is an important migratory corridor for fish and birds. The plant's location within 50 km of the coast means its effluent contributes to the overall nutrient load in the estuary, which is ecologically sensitive to eutrophication.

The plant discharges into the St. Lawrence River, which flows into the Gulf of St. Lawrence and then the Atlantic Ocean. The St. Lawrence Estuary is a critical habitat for marine mammals such as beluga whales and supports important fisheries. Nutrient inputs from wastewater can contribute to algal blooms and oxygen depletion in the estuary, making effective treatment essential for protecting downstream ecosystems.