Is Thread Lake Central Basin Safe for Swimming?
Thread Lake Central Basin in Genesee County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 1.8 ft visibility. Chlorophyll-a (algae): 7.6 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 1.8 ft |
| Chlorophyll-a (Algae) | 7.6 μg/L |
| Location | Genesee County, Wisconsin |
How does Thread Lake Central Basin compare?
With an overall water quality grade of C, Thread Lake Central Basin falls below the Wisconsin state average of Grade B. It ranks #7 of 9 lakes in Genesee County by water quality score.
Water clarity (Secchi depth) sits at 1.8 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 7.6 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.