Is Lake Lucern Safe for Swimming?
Lake Lucern in Warren County, Wisconsin has a water quality grade of C (Fair). Generally safe for swimming, moderate water quality. Water clarity: 5.2 ft visibility. Phosphorus: 25.8 µg/L. Chlorophyll-a (algae): 10.1 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 5.2 ft |
| Phosphorus | 25.8 μg/L |
| Chlorophyll-a (Algae) | 10.1 μg/L |
| Location | Warren County, Wisconsin |
How does Lake Lucern compare?
With an overall water quality grade of C, Lake Lucern matches or beats the Wisconsin state average of Grade C. It ranks #9 of 16 lakes in Warren County by water quality score.
Water clarity (Secchi depth) sits at 5.2 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 10.1 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.