Is Long Lake Safe for Swimming?
Long Lake in Otter Tail County, Minnesota has a water quality grade of D (Poor). Swimming not recommended — poor water quality with high algae risk. Water clarity: 3 ft visibility. Phosphorus: 37.5 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 | 37.5 μg/L |
| Location | Otter Tail County, Minnesota |