C
Roy Lake
Mahnomen County, Minnesota
Water Quality Grade: C — Fair
Murky — only visible to about 5.9 feet. Phosphorus level: 24 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 m | D |
| Phosphorus | 24 µg/L | B |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #12 of 17 lakes in Mahnomen County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-08
Monitoring stations: 2