How Clean Is Blacktail Dam Lake?
Blacktail Dam 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): 7.2 ft. Chlorophyll-a (algae): 8.6 µg/L. Trophic State Index: 50.
Cleanliness Snapshot
| Metric | Blacktail Dam Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 7.2 ft | — |
| Chlorophyll-a (Algae) | 8.6 µg/L | <10 = clean |
| Trophic State Index | 50 | <50 = clean |
How does Blacktail Dam Lake compare?
Blacktail Dam Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #3 of 9 lakes in Williams County by water quality score.