Is Ash Lake Safe for Swimming?
Ash Lake in St. Louis County, Minnesota has nutrient and algae measurements on record from state and federal monitoring. 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: 5.5 ft visibility. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 11.1 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Water Clarity (Secchi Depth) | 5.5 ft |
| Phosphorus | 39 μg/L |
| Chlorophyll-a (Algae) | 11.1 μg/L |
| Maximum Depth | 25 ft |
| Location | St. Louis County, Minnesota |
How does Ash Lake compare?
On nutrient and algae readings, Ash Lake matches or beats the Minnesota state average. It ranks #60 of 68 lakes in St. Louis County on nutrient and algae readings.
Water clarity (Secchi depth) sits at 5.5 feet. That falls into moderate clarity — typical for lakes with some nutrient enrichment. Algae levels (chlorophyll-a) measure 11.1 µg/L — moderate; acceptable for swimming on most days, but worth checking advisories.
Stays via Stay22
Where to stay near Ash Lake
Compare cabins, hotels, and vacation rentals near Ash Lake in St. Louis County, Minnesota. Live availability and prices for your nights. Switch the map to Satellite to see how close each stay is to the water.
Top-rated places to stay near Ash Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Ash Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Ash Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Ash Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.