How Clean Is Black Brook Flowage Lake?
Black Brook Flowage 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): 10.5 ft. Phosphorus: 46.6 µg/L. Trophic State Index: 51.
Cleanliness Snapshot
| Metric | Black Brook Flowage Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 10.5 ft | — |
| Phosphorus | 46.6 µg/L | <30 = clean |
| Trophic State Index | 51 | <50 = clean |
How does Black Brook Flowage Lake compare?
Black Brook Flowage Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #33 of 73 lakes in Polk County by water quality score.