How Clean Is Cole Lake?
Cole Lake is a clean lake by Wisconsin standards. It received a water quality grade of B (Good) based on EPA monitoring data. Water clarity (Secchi depth): 18.5 ft. Phosphorus: 17 µg/L. Chlorophyll-a (algae): 16.5 µg/L. Trophic State Index: 46.
Cleanliness Snapshot
| Metric | Cole Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 18.5 ft | — |
| Phosphorus | 17 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 16.5 µg/L | <10 = clean |
| Trophic State Index | 46 | <50 = clean |
How does Cole Lake compare?
Cole Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #3 of 7 lakes in Jefferson County by water quality score.