C
Rock Lake
Cass County, Minnesota
Water Quality Grade: C — Fair
Murky — only visible to about 5.9 feet. Phosphorus level: 29.5 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.81 m | D |
| Phosphorus | 29.5 µg/L | B |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #142 of 154 lakes in Cass County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-14
Monitoring stations: 1