Is Mason Lake Safe for Swimming?
Mason Lake in Otter Tail County, Minnesota has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 3 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) | 3 ft |
| Phosphorus | 21 μg/L |
| Maximum Depth | 108 ft |
| Location | Otter Tail County, Minnesota |
How does Mason Lake compare?
With an overall water quality grade of C, Mason Lake matches or beats the Minnesota state average of Grade C. It ranks #87 of 97 lakes in Otter Tail County by water quality score.
Water clarity (Secchi depth) sits at 3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.