How Clean Is Tappan Lake?
Tappan 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): 1.8 ft. Trophic State Index: 68.
Cleanliness Snapshot
| Metric | Tappan Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | D |
| Water Clarity (Secchi) | 1.8 ft | — |
| Trophic State Index | 68 | <50 = clean |
How does Tappan Lake compare?
Tappan Lake's grade of F falls below the Wisconsin state average of D. It ranks #2 of 2 lakes in Harrison County by water quality score.