Ville de Saint Marc etangs aeres Wastewater Treatment Plant - Saint-Marc-des-Carrières, Quebec

Ville de Saint Marc etangs aeres is a municipal wastewater treatment plant located at 215 Rue Gauthier in Saint-Marc-des-Carrières, Quebec, Canada. The plant serves a population of about 3,259 residents in the Portneuf Regional County Municipality within the Capitale-Nationale region. As a small-scale facility in Quebec, the plant operates under provincial environmental regulations that align with the Canadian federal framework. Treatment standards for communities of this size typically involve secondary treatment or equivalent processes to protect receiving waters. The plant's operational status confirms its role in local sanitation infrastructure. The plant discharges treated effluent into the local watershed, which ultimately drains into the St. Lawrence River via the Sainte-Anne River or nearby tributaries. The St. Lawrence River is a major ecological corridor supporting diverse aquatic life, including fish species such as Atlantic sturgeon and American eel, and provides drinking water for millions downstream.

The plant's treated effluent enters the local drainage network, which flows into the Sainte-Anne River and then the St. Lawrence River, one of North America's largest and most ecologically significant waterways. The St. Lawrence River supports a rich ecosystem, including migratory fish, waterfowl, and aquatic plants, and is a vital resource for communities and industries along its course. Protecting water quality in this watershed is essential for maintaining biodiversity and human uses.