Is Bright Lake Safe for Swimming?
Bright Lake in Martin County, Minnesota has a water quality grade of F (Algae-prone). Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Water clarity: 1 ft visibility. Phosphorus: 110.5 µg/L. Chlorophyll-a (algae): 54.1 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Overall Grade | F (Algae-prone) |
| Water Clarity (Secchi Depth) | 1 ft |
| Phosphorus | 110.5 μg/L |
| Chlorophyll-a (Algae) | 54.1 μg/L |
| Maximum Depth | 7 ft |
| Location | Martin County, Minnesota |
How does Bright Lake compare?
With an overall water quality grade of F, Bright Lake falls below the Minnesota state average of Grade C. It ranks #11 of 12 lakes in Martin County by water quality score.
Water clarity (Secchi depth) sits at 1 feet. That signals heavy algae or sediment, often tied to high phosphorus from runoff. Algae levels (chlorophyll-a) measure 54.1 µg/L — elevated; risk of harmful algal bloom advisories increases at this concentration.