D
Mason Lake -
Adams County, Wisconsin
Water Quality Grade: D — Poor
Murky — only visible to about 3.9 feet. Phosphorus level: 104.5 µg/L.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.2 m | D |
| Phosphorus | 104.5 µg/L | F |
| Chlorophyll-a (Algae) | No data |
County Ranking
Ranked #30 of 30 lakes in Adams County
Data Sources
Data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-08-19
Monitoring stations: 1