How Clean Is Green Lake?
Green 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 | Green Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 4.9 ft | — |
| Trophic State Index | 54 | <50 = clean |
How does Green Lake compare?
Green Lake's grade of D falls below the Wisconsin state average of C. It ranks #1 of 1 lakes in McIntosh County by water quality score.