How Clean Is Bone Lake?
Bone 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): 8 ft. Phosphorus: 19.8 µg/L. Trophic State Index: 47.
Cleanliness Snapshot
| Metric | Bone Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | B | B |
| Water Clarity (Secchi) | 8 ft | — |
| Phosphorus | 19.8 µg/L | <30 = clean |
| Trophic State Index | 47 | <50 = clean |
How does Bone Lake compare?
Bone Lake's grade of B matches or beats the Wisconsin state average of B. It ranks #4 of 55 lakes in Polk County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.