Is Turtle Lake Safe for Swimming?
Turtle Lake in Polk County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 3.6 ft visibility. Phosphorus: 56.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 3.6 ft |
| Phosphorus | 56.5 μg/L |
| Maximum Depth | 12 ft |
| Location | Polk County, Minnesota |
How does Turtle Lake compare?
With an overall water quality grade of C, Turtle Lake matches or beats the Minnesota state average of Grade C. It ranks #11 of 20 lakes in Polk County by water quality score.
Water clarity (Secchi depth) sits at 3.6 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.