Is Mason Lake Safe for Swimming?
Mason Lake in Adams County, Wisconsin has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 1.1 ft visibility. Phosphorus: 104.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 1.1 ft |
| Phosphorus | 104.5 μg/L |
| Maximum Depth | 9 ft |
| Location | Adams County, Wisconsin |
How does Mason Lake compare?
With an overall water quality grade of F, Mason Lake falls below the Wisconsin state average of Grade C. It ranks #19 of 19 lakes in Adams County by water quality score.
Water clarity (Secchi depth) sits at 1.1 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff.