Is Crystal Lake Safe for Swimming?
Crystal Lake in Hillsdale County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 9.5 ft visibility. Chlorophyll-a (algae): 4 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 9.5 ft |
| Chlorophyll-a (Algae) | 4 μg/L |
| Location | Hillsdale County, Wisconsin |
How does Crystal Lake compare?
With an overall water quality grade of B, Crystal Lake matches or beats the Wisconsin state average of Grade B. It ranks #1 of 7 lakes in Hillsdale County by water quality score.
Water clarity (Secchi depth) sits at 9.5 feet. That puts the lake in good clarity range, with limited algae interference. Algae levels (chlorophyll-a) measure 4 µg/L — low and well within safe swimming guidelines.