North Caribou Lagoon Wastewater Treatment Plant, Weagamow Lake, Ontario

North Caribou Lagoon is a wastewater treatment facility located in Weagamow Lake (ᐗᐎᔦᑲᒪᐠ), a remote First Nations community in the Kenora District of Northwestern Ontario, Canada. The plant provides secondary treatment, a standard level for Canadian municipal wastewater facilities, and serves the local population through its lagoon-based system. The plant operates under Ontario's regulatory framework for wastewater treatment, which requires secondary treatment for surface water discharges. The facility is sized for a small community. Canadian wastewater plants of this scale typically employ lagoon or mechanical treatment systems to meet federal and provincial effluent quality standards. The treated effluent from North Cariboo Lagoon enters the local watershed, which drains into the Severn River system and ultimately flows into Hudson Bay. The surrounding boreal forest and wetland ecosystems depend on clean water, making proper treatment essential for protecting aquatic habitats and traditional land uses in this remote region.

The plant discharges into the Severn River drainage basin, which flows northward into Hudson Bay. This remote watershed supports boreal forest wetlands and provides habitat for fish species such as walleye and northern pike. The area is ecologically sensitive due to its northern latitude and reliance on intact aquatic ecosystems for Indigenous subsistence and biodiversity.