How Clean Is Birch Lake?
Birch Lake is a clean lake by Wisconsin standards. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 6.5 ft. Phosphorus: 16.3 µg/L. Trophic State Index: 47.
Cleanliness Snapshot
| Metric | Birch Lake | Wisconsin avg |
|---|---|---|
| Water Clarity (Secchi) | 6.5 ft | — |
| Phosphorus | 16.3 µg/L | <30 = clean |
| Trophic State Index | 47 | <50 = clean |
How does Birch Lake compare?
Birch Lake's readings match or beat the Wisconsin state average. It ranks #14 of 103 lakes in Vilas County by water quality score. Multi-year monitoring data shows water quality is improving based on 7 years of records.
Watch Birch Lake water quality
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