Is Long Trade Lake Safe for Swimming?
Long Trade Lake in Polk County, Wisconsin has a water quality grade of D (Poor). Swimming not recommended, poor water quality with high algae risk. Water clarity: 3 ft visibility. Phosphorus: 87.6 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | D (Poor) |
| Water Clarity (Secchi Depth) | 3 ft |
| Phosphorus | 87.6 μg/L |
| Location | Polk County, Wisconsin |
How does Long Trade Lake compare?
With an overall water quality grade of D, Long Trade Lake falls below the Wisconsin state average of Grade C. It ranks #67 of 73 lakes in Polk County by water quality score.
Water clarity (Secchi depth) sits at 3 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment.