How Clean Is Harmony Lake?
Harmony 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): 2.3 ft. Chlorophyll-a (algae): 8.4 µg/L. Trophic State Index: 58.
Cleanliness Snapshot
| Metric | Harmony Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | C | C |
| Water Clarity (Secchi) | 2.3 ft | — |
| Chlorophyll-a (Algae) | 8.4 µg/L | <10 = clean |
| Trophic State Index | 58 | <50 = clean |
How does Harmony Lake compare?
Harmony Lake's grade of C matches or beats the Wisconsin state average of C. It ranks #5 of 5 lakes in Mercer County by water quality score.