How Clean Is Three Mile Lake?
Three Mile 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): 2.7 ft. Chlorophyll-a (algae): 28.4 µg/L. Trophic State Index: 63.
Cleanliness Snapshot
| Metric | Three Mile Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | D |
| Water Clarity (Secchi) | 2.7 ft | — |
| Chlorophyll-a (Algae) | 28.4 µg/L | <10 = clean |
| Trophic State Index | 63 | <50 = clean |
How does Three Mile Lake compare?
Three Mile Lake's grade of D matches or beats the Wisconsin state average of D. It ranks #1 of 6 lakes in Union County by water quality score.