Is Coon Lake Safe for Swimming?
Coon Lake in Anoka County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 5.6 ft visibility. Phosphorus: 23 µg/L. Chlorophyll-a (algae): 7.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 5.6 ft |
| Phosphorus | 23 μg/L |
| Chlorophyll-a (Algae) | 7.9 μg/L |
| Maximum Depth | 27 ft |
| Location | Anoka County, Minnesota |
How does Coon Lake compare?
With an overall water quality grade of C, Coon Lake matches or beats the Minnesota state average of Grade C. It ranks #8 of 24 lakes in Anoka County by water quality score.
Water clarity (Secchi depth) sits at 5.6 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 7.9 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.