Is Tioga Dam Lake Safe for Swimming?
Tioga Dam Lake in Williams County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 2.2 ft visibility. Chlorophyll-a (algae): 20 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 2.2 ft |
| Chlorophyll-a (Algae) | 20 μg/L |
| Location | Williams County, Wisconsin |
How does Tioga Dam Lake compare?
With an overall water quality grade of D, Tioga Dam Lake falls below the Wisconsin state average of Grade C. It ranks #9 of 9 lakes in Williams 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 20 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.