Lagoon Wastewater Treatment Plant, Waskaganish, Québec, Canada

The Lagoon wastewater treatment plant is located in Waskaganish (terre), within the municipality of Eeyou Istchee Baie-James in the Jamésie region of Nord-du-Québec, Canada. It serves a population of 2,227 residents and is currently operational. Reflecting its role in a small, remote community. As a facility in Canada, the plant operates under provincial and federal regulations, including the Canadian Environmental Protection Act and Québec's Environment Quality Act. For a small agglomeration of this size, lagoon-based treatment is a common and cost-effective method, typically providing secondary-level treatment through natural biological processes. Lagoons are widely used in northern communities for their simplicity and low energy requirements. The plant discharges treated wastewater into the local watershed, which ultimately drains into James Bay, a large body of water connected to Hudson Bay and the Arctic Ocean. The receiving environment supports diverse aquatic life, including fish species important to local Indigenous communities. The plant's proximity to the coast (within 50 km) underscores the need for effective treatment to protect downstream marine ecosystems.

The plant is situated in the watershed of the Rupert River or nearby rivers that flow into James Bay, a southern extension of Hudson Bay. This coastal region is ecologically sensitive, supporting migratory fish like brook trout and lake sturgeon, as well as waterfowl. The discharge from the plant enters a system that ultimately reaches the Arctic Ocean, making treatment quality important for both local and downstream ecosystems.