Is Spirit Lake Safe for Swimming?
Spirit Lake in Douglas County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 1.3 ft visibility. Phosphorus: 59.5 µg/L. Chlorophyll-a (algae): 1.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 1.3 ft |
| Phosphorus | 59.5 μg/L |
| Chlorophyll-a (Algae) | 1.5 μg/L |
| Location | Douglas County, Wisconsin |
How does Spirit Lake compare?
With an overall water quality grade of C, Spirit Lake falls below the Wisconsin state average of Grade B. It ranks #9 of 15 lakes in Douglas County by water quality score.
Water clarity (Secchi depth) sits at 1.3 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 1.5 µg/L — low and well within safe swimming guidelines.