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): 3.2 ft. Phosphorus: 92.8 µg/L. Trophic State Index: 65.
Cleanliness Snapshot
| Metric | Little Green Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | B |
| Water Clarity (Secchi) | 3.2 ft | — |
| Phosphorus | 92.8 µg/L | <30 = clean |
| Trophic State Index | 65 | <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 #5 of 7 lakes in Green Lake County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.