Is Maple Lake Safe for Swimming?
Maple Lake in Polk County, Minnesota has a water quality grade of C (Fair). Swim with caution, moderate algae may be present. Water clarity: 3.3 ft visibility. Phosphorus: 38.5 µg/L. Chlorophyll-a (algae): 17.8 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | C (Fair) |
| Water Clarity (Secchi Depth) | 3.3 ft |
| Phosphorus | 38.5 μg/L |
| Chlorophyll-a (Algae) | 17.8 μg/L |
| Maximum Depth | 14 ft |
| Location | Polk County, Minnesota |
How does Maple Lake compare?
With an overall water quality grade of C, Maple Lake matches or beats the Minnesota state average of Grade C. It ranks #9 of 19 lakes in Polk County by water quality score.
Water clarity (Secchi depth) sits at 3.3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 17.8 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.
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