Is Fremont Lake Safe for Swimming?
Fremont Lake in Sherburne County, Minnesota has nutrient and algae measurements on record from state and federal monitoring. Chlorophyll-a in the monitoring record runs high enough that algae is a factor. A water-quality reading is not a swimming clearance. The state water agency and county health departments post current advisories; check them before you swim.. Water clarity: 3 ft visibility. Phosphorus: 40 µg/L. Chlorophyll-a (algae): 17.3 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 3 ft |
| Phosphorus | 40 μg/L |
| Chlorophyll-a (Algae) | 17.3 μg/L |
| Maximum Depth | 8 ft |
| Location | Sherburne County, Minnesota |
How does Fremont Lake compare?
With an overall water-quality readings of —, Fremont Lake runs above the Minnesota state average. It ranks #11 of 18 lakes in Sherburne 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. Algae levels (chlorophyll-a) measure 17.3 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.
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