A
Big Lake
Carlton County, Minnesota
Water Quality Grade: A — Excellent
Crystal clear — you can see 26.1 feet down. Phosphorus level: 12.5 µg/L. Chlorophyll-a: 3.1 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.95 m | A |
| Phosphorus | 12.5 µg/L | A |
| Chlorophyll-a (Algae) | 3.1 µg/L | A |
County Ranking
Ranked #1 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: 2024-10-09
Monitoring stations: 1