How Clean Is Rocky Fork Lake?
Rocky Fork 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): 2.3 ft. Phosphorus: 73.8 µg/L. Chlorophyll-a (algae): 38.1 µg/L. Trophic State Index: 66.
Cleanliness Snapshot
| Metric | Rocky Fork Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 2.3 ft | — |
| Phosphorus | 73.8 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 38.1 µg/L | <10 = clean |
| Trophic State Index | 66 | <50 = clean |
How does Rocky Fork Lake compare?
Rocky Fork Lake's grade of F falls below the Wisconsin state average of C. It ranks #9 of 12 lakes in Boone County by water quality score.