How Clean Is Greenfield Lake?
Greenfield Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Phosphorus: 66 µg/L. Trophic State Index: 65.
Cleanliness Snapshot
| Metric | Greenfield Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | D |
| Phosphorus | 66 µg/L | <30 = clean |
| Trophic State Index | 65 | <50 = clean |
How does Greenfield Lake compare?
Greenfield Lake's grade of D matches or beats the Wisconsin state average of D. It ranks #1 of 1 lakes in Greene County by water quality score.