Is Otter Lake Safe for Swimming?
Otter Lake in Macoupin County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 1.8 ft visibility. Phosphorus: 37 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 1.8 ft |
| Phosphorus | 37 μg/L |
| Location | Macoupin County, Wisconsin |
How does Otter Lake compare?
With an overall water quality grade of D, Otter Lake matches or beats the Wisconsin state average of Grade D. It ranks #2 of 3 lakes in Macoupin County by water quality score.
Water clarity (Secchi depth) sits at 1.8 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff.