A
Perch Lake
St. Louis County, Minnesota
Water Quality Grade: A — Excellent
Good clarity — visible to about 13.5 feet. Phosphorus level: 11 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.11 m | B |
| Phosphorus | 11 µg/L | A |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #42 of 198 lakes in St. Louis County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-10-09
Monitoring stations: 3