How Clean Is Sunnen Lake?
Sunnen Lake has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 1 ft. Phosphorus: 61 µg/L. Chlorophyll-a (algae): 14.3 µg/L. Trophic State Index: 66.
Cleanliness Snapshot
| Metric | Sunnen Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | C |
| Water Clarity (Secchi) | 1 ft | — |
| Phosphorus | 61 µg/L | <30 = clean |
| Chlorophyll-a (Algae) | 14.3 µg/L | <10 = clean |
| Trophic State Index | 66 | <50 = clean |
How does Sunnen Lake compare?
Sunnen Lake's grade of D falls below the Wisconsin state average of C. It ranks #2 of 2 lakes in Washington County by water quality score.