Is Lake Poygan Safe for Swimming?
Lake Poygan in Winnebago County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Not rated for swimming — there is not enough monitoring data to judge this lake. Water clarity: 2.5 ft visibility. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | NR (Not rated) |
| Water Clarity (Secchi Depth) | 2.5 ft |
| Maximum Depth | 11 ft |
| Location | Winnebago County, Wisconsin |
How does Lake Poygan compare?
Lake Poygan is not rated for water quality — its monitoring record does not meet the evidence bar, so it is not compared with the Wisconsin state average.
Water clarity (Secchi depth) sits at 2.5 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff.