How Clean Is Sprague Lake?
Sprague 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): 1.6 ft. Chlorophyll-a (algae): 43.4 µg/L. Trophic State Index: 69.
Cleanliness Snapshot
| Metric | Sprague Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | F | C |
| Water Clarity (Secchi) | 1.6 ft | — |
| Chlorophyll-a (Algae) | 43.4 µg/L | <10 = clean |
| Trophic State Index | 69 | <50 = clean |
How does Sprague Lake compare?
Sprague Lake's grade of F falls below the Wisconsin state average of C. It ranks #3 of 3 lakes in Sargent County by water quality score.