Is Jonathan Lake Safe for Swimming?
Jonathan Lake in Carver County, Minnesota has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 1.5 ft visibility. Phosphorus: 157.5 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 1.5 ft |
| Phosphorus | 157.5 μg/L |
| Location | Carver County, Minnesota |
How does Jonathan Lake compare?
With an overall water quality grade of F, Jonathan Lake falls below the Minnesota state average of Grade C. It ranks #26 of 40 lakes in Carver County by water quality score.
Water clarity (Secchi depth) sits at 1.5 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff.