A
Long Lake
Beltrami County, Minnesota
Water Quality Grade: A — Excellent
Crystal clear — you can see 45.9 feet down. Phosphorus level: 8 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 14 m | A |
| Phosphorus | 8 µg/L | A |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #28 of 87 lakes in Beltrami County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-17
Monitoring stations: 1