Is Stone Lake Safe for Swimming?
Stone Lake in Sully County, South Dakota has limited nutrient and algae sampling on record. 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.. Chlorophyll-a (algae): 18.1 µg/L. Always check local health department advisories before swimming.
Key Metrics
| Metric | Value |
|---|---|
| Chlorophyll-a (Algae) | 18.1 μg/L |
| Location | Sully County, South Dakota |
How does Stone Lake compare?
Stone Lake does not have enough recent summer sampling to compare with the South Dakota state average.
Stays via Stay22
Where to stay near Stone Lake
Compare cabins, hotels, and vacation rentals near Stone Lake in Sully County, South Dakota. 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 Stone Lake
Prices for Oct 16–18, 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 Stone Lake?
Get lake water-quality updates plus the best cabin & lodging deals near Stone Lake — straight to your inbox. No spam, unsubscribe anytime.
Watch Stone Lake water quality
Get an email when the clarity or algae readings change. Unsubscribe anytime.