Is Cannon Lake Safe for Swimming?
Cannon Lake in Rice County, Minnesota has a water quality grade of F (Algae-prone). Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Water clarity: 4.1 ft visibility. Phosphorus: 244 µg/L. Chlorophyll-a (algae): 46.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Algae-prone) |
| Water Clarity (Secchi Depth) | 4.1 ft |
| Phosphorus | 244 μg/L |
| Chlorophyll-a (Algae) | 46.5 μg/L |
| Maximum Depth | 15 ft |
| Location | Rice County, Minnesota |
How does Cannon Lake compare?
With an overall water quality grade of F, Cannon Lake falls below the Minnesota state average of Grade C. It ranks #12 of 14 lakes in Rice County by water quality score.
Water clarity (Secchi depth) sits at 4.1 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 46.5 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.