How Clean Is South Bay Lake?
South Bay Lake is among the cleanest lakes in Wisconsin. It received a water quality grade of A (Excellent) based on EPA monitoring data. Water clarity (Secchi depth): 41 ft. Trophic State Index: 24.
Cleanliness Snapshot
| Metric | South Bay Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 41 ft | — |
| Trophic State Index | 24 | <50 = clean |
How does South Bay Lake compare?
South Bay Lake's grade of A matches or beats the Wisconsin state average of B. It ranks #10 of 35 lakes in Forest County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.