B
Portage Lake
Cook County, Minnesota
Water Quality Grade: B — Good
Moderate clarity — visible to about 8.5 feet. Phosphorus level: 9.5 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 m | C |
| Phosphorus | 9.5 µg/L | A |
| Chlorophyll-a (Algae) | No data |
Location
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County Ranking
Ranked #40 of 128 lakes in Cook County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-09-15
Monitoring stations: 1