Is Umk-01 Lake Safe for Swimming?
Umk-01 Lake in St. Joseph County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 2.1 ft visibility. Chlorophyll-a (algae): 10.4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 2.1 ft |
| Chlorophyll-a (Algae) | 10.4 μg/L |
| Location | St. Joseph County, Wisconsin |
How does Umk-01 Lake compare?
With an overall water quality grade of D, Umk-01 Lake matches or beats the Wisconsin state average of Grade D. It ranks #1 of 2 lakes in St. Joseph County by water quality score.
Water clarity (Secchi depth) sits at 2.1 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 10.4 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.