Is Thomas Hill Res. Nr. Dam Lake Safe for Swimming?
Thomas Hill Res. Nr. Dam Lake in Randolph County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 2.3 ft visibility. Phosphorus: 61 µg/L. Chlorophyll-a (algae): 14.2 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 2.3 ft |
| Phosphorus | 61 μg/L |
| Chlorophyll-a (Algae) | 14.2 μg/L |
| Location | Randolph County, Wisconsin |
How does Thomas Hill Res. Nr. Dam Lake compare?
With an overall water quality grade of D, Thomas Hill Res. Nr. Dam Lake falls below the Wisconsin state average of Grade C. It ranks #6 of 7 lakes in Randolph County by water quality score.
Water clarity (Secchi depth) sits at 2.3 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 14.2 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.