Is Mary Lake Safe for Swimming?
Mary Lake in Crow Wing County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 4.1 ft visibility. Phosphorus: 21 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 4.1 ft |
| Phosphorus | 21 μg/L |
| Maximum Depth | 34 ft |
| Location | Crow Wing County, Minnesota |
How does Mary Lake compare?
With an overall water quality grade of C, Mary Lake matches or beats the Minnesota state average of Grade C. It ranks #105 of 120 lakes in Crow Wing 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.