How Clean Is Larson Lake?
Larson 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): 4.8 ft. Chlorophyll-a (algae): 13.1 µg/L. Trophic State Index: 55.
Cleanliness Snapshot
| Metric | Larson Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 4.8 ft | — |
| Chlorophyll-a (Algae) | 13.1 µg/L | <10 = clean |
| Trophic State Index | 55 | <50 = clean |
How does Larson Lake compare?
Larson Lake's grade of C matches or beats the Wisconsin state average of C. It ranks #1 of 3 lakes in Hettinger County by water quality score.