How Clean Is Green Lake?
Green Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Phosphorus: 20.6 µg/L. Trophic State Index: 48.
Cleanliness Snapshot
| Metric | Green Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | B |
| Phosphorus | 20.6 µg/L | <30 = clean |
| Trophic State Index | 48 | <50 = clean |
How does Green Lake compare?
Green Lake's grade of B matches or beats the Wisconsin state average of B. It ranks #2 of 7 lakes in Green Lake County by water quality score.