How Clean Is South Turtle Lake?
South Turtle 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): 26.2 ft. Phosphorus: 17.4 µg/L. Trophic State Index: 38.
Cleanliness Snapshot
| Metric | South Turtle Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | A | B |
| Water Clarity (Secchi) | 26.2 ft | — |
| Phosphorus | 17.4 µg/L | <30 = clean |
| Trophic State Index | 38 | <50 = clean |
How does South Turtle Lake compare?
South Turtle Lake's grade of A matches or beats the Wisconsin state average of B. It ranks #70 of 202 lakes in Vilas County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.