Folsom Lake
Whitman County, Washington76 acresView mapDirections
No nutrient or algae sampling on record from Washington Ecology for this lake.
Folsom Lake in Whitman County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 76 acres.
Folsom Lake is a 76-acre lake in Whitman County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology. Methodology: how these readings are compared.
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Folsom Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Folsom Lake
These are the measurements Washington Ecology publishes for Folsom Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Folsom Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
76 acres
Shoreline
3 mi
No bathymetric survey has been published for Folsom Lake, so its depth is not documented here.
Stays via Stay22
Stays near Folsom Lake
Compare lakeside cabins, hotels, and vacation rentals near Folsom Lake in Whitman County, Washington — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Folsom 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 whole trip? See where to stay at Washington’s top lakes →
Follow Folsom Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Folsom Lake
Nearby Lakes in Whitman County
Frequently asked questions about Folsom Lake
Where is Folsom Lake?
- Folsom Lake is a lake in Whitman County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Folsom Lake?
- Folsom Lake in Whitman County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Surface area: 76 acres.
Is Folsom Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Folsom Lake across LakeQuality
More lakes in Washington
Other Lakes in Washington
Where this data comes from
Measurements for Folsom Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.