B
Big Portage Lake
Cass County, Minnesota
Water Quality Grade: B — Good
Moderate clarity — visible to about 7.5 feet. Phosphorus level: 20 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 m | C |
| Phosphorus | 20 µg/L | B |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #136 of 154 lakes in Cass County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-11
Monitoring stations: 2