Is Froelich Dam Lake Safe for Swimming?
Froelich Dam Lake in Sioux County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 3.9 ft visibility. Chlorophyll-a (algae): 37.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 3.9 ft |
| Chlorophyll-a (Algae) | 37.5 μg/L |
| Location | Sioux County, Wisconsin |
How does Froelich Dam Lake compare?
With an overall water quality grade of D, Froelich Dam Lake falls below the Wisconsin state average of Grade C. It ranks #1 of 1 lakes in Sioux County by water quality score.
Water clarity (Secchi depth) sits at 3.9 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 37.5 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.