How Clean Is Big Round Deep Hole South Lake?
Big Round Deep Hole South Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 4.9 ft. Trophic State Index: 54.
Cleanliness Snapshot
| Metric | Big Round Deep Hole South Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | B |
| Water Clarity (Secchi) | 4.9 ft | — |
| Trophic State Index | 54 | <50 = clean |
How does Big Round Deep Hole South Lake compare?
Big Round Deep Hole South Lake's grade of D falls below the Wisconsin state average of B. It ranks #75 of 77 lakes in Polk County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.