How Clean Is Little Green Lake?
Little Green Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 2.9 ft. Phosphorus: 97.6 µg/L. Trophic State Index: 66.
Cleanliness Snapshot
| Metric | Little Green Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 2.9 ft | — |
| Phosphorus | 97.6 µg/L | <30 = clean |
| Trophic State Index | 66 | <50 = clean |
How does Little Green Lake compare?
Little Green Lake's grade of F falls below the Wisconsin state average of C. It ranks #10 of 13 lakes in Green Lake County by water quality score. Multi-year monitoring data shows water quality is improving based on 4 years of records.