Cross Lake Wastewater Lagoon - Secondary Treatment Plant in Cross Lake, Manitoba

Cross Lake Wastewater Lagoon is a municipal wastewater treatment facility located in the community of Cross Lake (ᐱᒥᒋᑲᒫᐠ), Manitoba, Canada. The plant serves a small population of 251 residents, providing secondary treatment through lagoon-based processes typical of remote northern communities. As a secondary treatment facility, the plant meets the basic Canadian federal and provincial standards for wastewater treatment, which require removal of biodegradable organic matter and suspended solids. For small communities in Manitoba, lagoon systems are common due to their low operational costs and suitability for cold climates. The plant's discharge volume of 112.50 megaliters per year reflects the scale of this small agglomeration. The treated effluent is discharged into the local watershed, which ultimately drains into the Nelson River system and then into Hudson Bay. The Cross Lake area is part of the boreal forest region, supporting diverse aquatic life and serving as an important habitat for fish and waterfowl. Proper treatment helps protect downstream water quality in this ecologically sensitive region.

The plant discharges into the local watershed that flows into the Nelson River, one of Canada's major rivers, which empties into Hudson Bay. This region supports diverse aquatic ecosystems, including fish species such as walleye and northern pike, and provides habitat for migratory birds. The boreal forest watershed is sensitive to nutrient loading, making secondary treatment important for maintaining water quality.