Is Phillips Lake Safe for Swimming?
Phillips Lake in Boone County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 2.8 ft visibility. Phosphorus: 35.5 µg/L. Chlorophyll-a (algae): 8.8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 2.8 ft |
| Phosphorus | 35.5 μg/L |
| Chlorophyll-a (Algae) | 8.8 μg/L |
| Location | Boone County, Wisconsin |
How does Phillips Lake compare?
With an overall water quality grade of C, Phillips Lake matches or beats the Wisconsin state average of Grade C. It ranks #4 of 12 lakes in Boone County by water quality score.
Water clarity (Secchi depth) sits at 2.8 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 8.8 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.