Is Castlenovo Lake Safe for Swimming?
Castlenovo Lake in Warren County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 6 ft visibility. Phosphorus: 16.8 µg/L. Chlorophyll-a (algae): 2.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 6 ft |
| Phosphorus | 16.8 μg/L |
| Chlorophyll-a (Algae) | 2.9 μg/L |
| Location | Warren County, Wisconsin |
How does Castlenovo Lake compare?
With an overall water quality grade of B, Castlenovo Lake matches or beats the Wisconsin state average of Grade C. It ranks #5 of 16 lakes in Warren County by water quality score.
Water clarity (Secchi depth) sits at 6 feet. That puts the lake in good clarity range, with limited algae interference. Algae levels (chlorophyll-a) measure 2.9 µg/L — low and well within safe swimming guidelines.