Oakville Southeast Wastewater Treatment Plant | Oakville, Ontario, Canada

The Oakville Southeast Wastewater Treatment Plant is a municipal facility located in Oakville, Ontario, within the Halton Region of the Golden Horseshoe. It serves a population of approximately 45,067 residents, classifying it as a medium-sized agglomeration under Canadian wastewater management frameworks. The plant is situated near the shoreline of Lake Ontario, one of the Great Lakes, and its operations are critical to protecting this vital freshwater resource. As a Canadian wastewater treatment plant, it operates under provincial regulations administered by the Ontario Ministry of the Environment, Conservation and Parks. Facilities of this scale are typically required to provide at least secondary treatment to meet effluent quality standards. The plant's designed capacity is 1.00 million cubic meters per day, indicating a robust infrastructure to handle the community's wastewater needs. The treated effluent from the plant discharges into the Lake Ontario basin, which ultimately flows into the St. Lawrence River and then the Atlantic Ocean. Lake Ontario supports diverse aquatic life, including fish species such as lake trout and salmon, and provides drinking water for millions of people. The plant's role in maintaining water quality is essential for the ecological health of the lake and downstream environments.

The plant discharges into the Lake Ontario watershed, part of the Great Lakes system, which drains via the St. Lawrence River to the Atlantic Ocean. Lake Ontario is a ecologically sensitive freshwater lake that supports diverse aquatic life, including native fish populations and migratory birds. The plant's location within 50 km of the coast underscores its importance in preventing nutrient and pollutant loading that could impact nearshore habitats and drinking water intakes.