etangs aerees de Obedjiwan Wastewater Treatment Plant, Obedjiwan, Quebec

The etangs aerees de Obedjiwan is a municipal wastewater treatment plant located in Obedjiwan, Quebec, Canada. It serves a population of approximately 1,183 residents, providing essential sanitation services for this small community in the Mauricie region. The plant is situated near the shores of a large inland water body, reflecting its coastal classification despite being inland. The plant operates at the secondary treatment level, which is appropriate for its small population size. Under Canadian federal and provincial regulations, secondary treatment is the standard for municipal wastewater to protect receiving waters. The plant's discharge volume is reported at 531 cubic meters, indicating a modest flow consistent with the community's size. The treated effluent is discharged into the local watershed, which ultimately drains into the Saint Lawrence River system and then the Atlantic Ocean. The plant's proximity to the coast (within 10 km) means its discharge can influence nearby aquatic ecosystems. Proper treatment helps safeguard water quality for downstream communities and wildlife.

The plant discharges into the local watershed that feeds into the Saint Lawrence River, one of Canada's most significant waterways. The Saint Lawrence River flows into the Gulf of Saint Lawrence and then the Atlantic Ocean. The area supports diverse aquatic life, including fish species such as walleye and pike, and is an important migratory corridor for birds. The plant's coastal location means its effluent can affect nearshore water quality and habitats, making secondary treatment crucial for minimizing environmental impact.