Is Charles Mill Reservoir Safe for Swimming?
Charles Mill Reservoir in Ashland County, Wisconsin has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 0.9 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 0.9 ft |
| Location | Ashland County, Wisconsin |
How does Charles Mill Reservoir compare?
With an overall water quality grade of F, Charles Mill Reservoir falls below the Wisconsin state average of Grade D. It ranks #1 of 1 lakes in Ashland County by water quality score.
Water clarity (Secchi depth) sits at 0.9 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff.