How Clean Is Long Lake?
Long 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): 9.5 ft. Phosphorus: 17.5 µg/L. Trophic State Index: 45.
Cleanliness Snapshot
| Metric | Long Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | C |
| Water Clarity (Secchi) | 9.5 ft | — |
| Phosphorus | 17.5 µg/L | <30 = clean |
| Trophic State Index | 45 | <50 = clean |
How does Long Lake compare?
Long Lake's grade of B matches or beats the Wisconsin state average of C. It ranks #24 of 47 lakes in Washburn County by water quality score.