Is Custer Mine Pond Safe for Swimming?
Custer Mine Pond in McLean County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 2.2 ft visibility. Chlorophyll-a (algae): 3.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 2.2 ft |
| Chlorophyll-a (Algae) | 3.3 μg/L |
| Location | McLean County, Wisconsin |
How does Custer Mine Pond compare?
With an overall water quality grade of C, Custer Mine Pond matches or beats the Wisconsin state average of Grade C. It ranks #3 of 3 lakes in McLean County by water quality score.
Water clarity (Secchi depth) sits at 2.2 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 3.3 µg/L — low and well within safe swimming guidelines.