A
Armstrong Lake
St. Louis County, MinnesotaLimited Data
Water Quality Grade: A — Excellent
Crystal clear — you can see 16.2 feet down.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.95 m | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #14 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: 2023-09-03
Monitoring stations: 4