Whitefish Bay Wastewater System - Naotkamegwanning, Ontario | Secondary Treatment Plant

Whitefish Bay Wastewater System serves the community of Naotkamegwanning (Whitefish Bay) in northwestern Ontario, Canada. This small-scale facility treats wastewater from approximately 401 residents, operating under Ontario's regulatory framework for municipal sewage. The plant provides secondary treatment, which is the standard level required by Canadian federal and provincial guidelines for communities of this size. Secondary treatment removes biodegradable organic matter and suspended solids, reducing environmental impact on receiving waters. The plant's discharge volume is 180 cubic meters per day, reflecting its small service population. The treated effluent is discharged into the Lake of the Woods watershed, a large freshwater lake system that drains into the Winnipeg River and ultimately into Hudson Bay. Lake of the Woods supports diverse aquatic life, including fish species important for local subsistence and recreation. The plant's coastal proximity (within 10 km of the lake) underscores the importance of effective treatment to protect water quality in this sensitive boreal ecosystem.

The plant discharges into the Lake of the Woods basin, a large freshwater lake that flows via the Winnipeg River into Lake Winnipeg and eventually Hudson Bay. This watershed supports cold-water fish species, waterfowl, and aquatic vegetation, and is ecologically sensitive due to its northern location and relatively slow water exchange. Protecting water quality is critical for maintaining the lake's ecological health and the traditional uses by Indigenous communities.