How Clean Is Big Stone Lake?
Big Stone Lake has fair water quality — typical of lakes with moderate nutrient enrichment. It received a water quality grade of C (Fair) based on EPA monitoring data. Water clarity (Secchi depth): 6.1 ft. Phosphorus: 22.5 µg/L. Trophic State Index: 50.
Cleanliness Snapshot
| Metric | Big Stone Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | B |
| Water Clarity (Secchi) | 6.1 ft | — |
| Phosphorus | 22.5 µg/L | <30 = clean |
| Trophic State Index | 50 | <50 = clean |
How does Big Stone Lake compare?
Big Stone Lake's grade of C falls below the Wisconsin state average of B. It ranks #129 of 140 lakes in Oneida County by water quality score. Multi-year monitoring data shows water quality is improving based on 6 years of records.