How Clean Is Little Green Lake?
Little 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): 8.9 ft. Phosphorus: 91.7 µg/L. Trophic State Index: 57.
Cleanliness Snapshot
| Metric | Little Green Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | B |
| Water Clarity (Secchi) | 8.9 ft | — |
| Phosphorus | 91.7 µg/L | <30 = clean |
| Trophic State Index | 57 | <50 = clean |
How does Little Green Lake compare?
Little Green Lake's grade of D falls below the Wisconsin state average of B. It ranks #10 of 13 lakes in Green Lake County by water quality score. Multi-year monitoring data shows water quality is stable based on 5 years of records.