Is Marl Lake Safe for Swimming?
Marl Lake in Waupaca County, Wisconsin has a water quality grade of A (Excellent). Excellent for swimming, crystal clear water with minimal algae. Water clarity: 13.6 ft visibility. Phosphorus: 9.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | A (Excellent) |
| Water Clarity (Secchi Depth) | 13.6 ft |
| Phosphorus | 9.9 μg/L |
| Location | Waupaca County, Wisconsin |
How does Marl Lake compare?
With an overall water quality grade of A, Marl Lake matches or beats the Wisconsin state average of Grade C. It ranks #6 of 25 lakes in Waupaca County by water quality score.
Water clarity (Secchi depth) sits at 13.6 feet. That counts as exceptional clarity — sunlight penetrates deep, supporting submerged plants and limiting algae.