How Clean Is Lac Courte Oreilles Lake?
Lac Courte Oreilles Lake is among the cleanest lakes in Wisconsin. Its nutrient and algae readings come from EPA monitoring data. Water clarity (Secchi depth): 12.2 ft. Phosphorus: 15 µg/L. Chlorophyll-a (algae): 1.7 µg/L. Trophic State Index: 40.
Cleanliness Snapshot
| Metric | Lac Courte Oreilles Lake | Wisconsin avg |
|---|---|---|
| Water Clarity (Secchi) | 12.2 ft | — |
| Phosphorus | 15 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 1.7 µg/L | <10 = clean |
| Trophic State Index | 40 | <50 = clean |
How does Lac Courte Oreilles Lake compare?
Lac Courte Oreilles Lake's readings match or beat the Wisconsin state average. It ranks #1 of 45 lakes in Sawyer County by water quality score. Multi-year monitoring data shows water quality is improving based on 5 years of records.
Watch Lac Courte Oreilles Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.