How Clean Is Big Lake?
Big 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): 7 ft. Trophic State Index: 49.
Cleanliness Snapshot
| Metric | Big Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | B |
| Water Clarity (Secchi) | 7 ft | — |
| Trophic State Index | 49 | <50 = clean |
How does Big Lake compare?
Big Lake's grade of C falls below the Wisconsin state average of B. It ranks #195 of 202 lakes in Vilas County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.