C
Perch Lake
Carlton County, Minnesota
Water Quality Grade: C — Fair
Very murky — less than 2.3 feet of visibility. Phosphorus level: 30 µg/L. Chlorophyll-a: 5.8 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.7 m | F |
| Phosphorus | 30 µg/L | C |
| Chlorophyll-a (Algae) | 5.8 µg/L | B |
County Ranking
Ranked #32 of 41 lakes in Carlton County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-10-07
Monitoring stations: 1