Is Long Lake Safe for Swimming?
Long Lake in Kandiyohi County, Minnesota has a water quality grade of F (Very Poor). Avoid swimming, very poor water quality, potential algae toxins. Water clarity: 5 ft visibility. Phosphorus: 92 µg/L. Chlorophyll-a (algae): 42.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Very Poor) |
| Water Clarity (Secchi Depth) | 5 ft |
| Phosphorus | 92 μg/L |
| Chlorophyll-a (Algae) | 42.3 μg/L |
| Maximum Depth | 16 ft |
| Location | Kandiyohi County, Minnesota |
How does Long Lake compare?
With an overall water quality grade of F, Long Lake falls below the Minnesota state average of Grade C. It ranks #18 of 25 lakes in Kandiyohi County by water quality score.
Water clarity (Secchi depth) sits at 5 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 42.3 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.