How Clean Is Black Hawk Lake?
Black Hawk 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): 0.9 ft. Chlorophyll-a (algae): 54.1 µg/L. Trophic State Index: 74.
Cleanliness Snapshot
| Metric | Black Hawk Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | D |
| Water Clarity (Secchi) | 0.9 ft | — |
| Chlorophyll-a (Algae) | 54.1 µg/L | <10 = clean |
| Trophic State Index | 74 | <50 = clean |
How does Black Hawk Lake compare?
Black Hawk Lake's grade of F falls below the Wisconsin state average of D. It ranks #2 of 2 lakes in Sac County by water quality score.