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): 3.7 ft. Chlorophyll-a (algae): 13.9 µg/L. Trophic State Index: 57.
Cleanliness Snapshot
| Metric | Devils Lake | North Dakota avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 3.7 ft | — |
| Chlorophyll-a (Algae) | 13.9 µg/L | <10 = clean |
| Trophic State Index | 57 | <50 = clean |
How does Devils Lake compare?
Devils Lake's grade of C matches or beats the North Dakota state average of C. It ranks #4 of 4 lakes in Benson County by water quality score.