Is Big Round Lake Safe for Swimming?
Big Round Lake in Polk County, Wisconsin has nutrient and algae measurements on record from state and federal monitoring. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 5 ft visibility. Phosphorus: 27 µg/L. Chlorophyll-a (algae): 6.9 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 5 ft |
| Phosphorus | 27 μg/L |
| Chlorophyll-a (Algae) | 6.9 μg/L |
| Maximum Depth | 17 ft |
| Location | Polk County, Wisconsin |
How does Big Round Lake compare?
With an overall water-quality readings of —, Big Round Lake runs above the Wisconsin state average. It ranks #28 of 55 lakes in Polk County by water quality score.
Water clarity (Secchi depth) sits at 5 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 6.9 µg/L — low and well within safe swimming guidelines.
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