Is King Lake Safe for Swimming?
King Lake in DeKalb County, Wisconsin has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 0.6 ft visibility. Phosphorus: 186 µg/L. Chlorophyll-a (algae): 39.2 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 0.6 ft |
| Phosphorus | 186 μg/L |
| Chlorophyll-a (Algae) | 39.2 μg/L |
| Location | DeKalb County, Wisconsin |
How does King Lake compare?
With an overall water quality grade of F, King Lake falls below the Wisconsin state average of Grade C. It ranks #5 of 6 lakes in DeKalb County by water quality score.
Water clarity (Secchi depth) sits at 0.6 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 39.2 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.