Is Rock Lake Village Lake Safe for Swimming?
Rock Lake Village Lake in Johnson County, Wisconsin has a water quality grade of B (Good). Good for swimming, clear water with low algae levels. Water clarity: 4.3 ft visibility. Phosphorus: 16 µg/L. Chlorophyll-a (algae): 4.8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | B (Good) |
| Water Clarity (Secchi Depth) | 4.3 ft |
| Phosphorus | 16 μg/L |
| Chlorophyll-a (Algae) | 4.8 μg/L |
| Location | Johnson County, Wisconsin |
How does Rock Lake Village Lake compare?
With an overall water quality grade of B, Rock Lake Village Lake matches or beats the Wisconsin state average of Grade C. It ranks #1 of 5 lakes in Johnson County by water quality score.
Water clarity (Secchi depth) sits at 4.3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 4.8 µg/L — low and well within safe swimming guidelines.