How Clean Is Izaak Walton Lake?
Izaak Walton Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 1.5 ft. Phosphorus: 280 µg/L. Chlorophyll-a (algae): 123.1 µg/L. Trophic State Index: 78.
Cleanliness Snapshot
| Metric | Izaak Walton Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 1.5 ft | — |
| Phosphorus | 280 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 123.1 µg/L | <10 = clean |
| Trophic State Index | 78 | <50 = clean |
How does Izaak Walton Lake compare?
Izaak Walton Lake's grade of F falls below the Wisconsin state average of C. It ranks #1 of 1 lakes in Vernon County by water quality score.