How Clean Is Mason Lake?
Mason 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): 3.9 ft. Phosphorus: 104.5 µg/L. Trophic State Index: 64.
Cleanliness Snapshot
| Metric | Mason Lake | Wisconsin avg |
|---|---|---|
| Overall Grade | D | B |
| Water Clarity (Secchi) | 3.9 ft | — |
| Phosphorus | 104.5 µg/L | <30 = clean |
| Trophic State Index | 64 | <50 = clean |
How does Mason Lake compare?
Mason Lake's grade of D falls below the Wisconsin state average of B. It ranks #20 of 20 lakes in Adams County by water quality score. Multi-year monitoring data shows water quality is declining based on 7 years of records.