How Clean Is Devils Lake?
Devils 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): 5.2 ft. Chlorophyll-a (algae): 17 µg/L. Trophic State Index: 56.
Cleanliness Snapshot
| Metric | Devils Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 5.2 ft | — |
| Chlorophyll-a (Algae) | 17 µg/L | <10 = clean |
| Trophic State Index | 56 | <50 = clean |
How does Devils Lake compare?
Devils Lake's grade of C matches or beats the Wisconsin state average of C. It ranks #1 of 8 lakes in Ramsey County by water quality score.