WA
Radon Test Kits in Washington
Free kit from the Washington State Department of Health, while supplies last.
We checked this on October 1, 2026. Confirm the official page before you travel. Prices and stock change.
Where to get a kit
Washington free radon test kits
The Washington State Department of Health mails a free radon test kit while supplies last. Allow 8 to 10 weeks.
Kansas State University mail-in kit: $20
Mail-in lab kit, lab fee included. Mail it back within 10 days.
Or call 1-800-767-7236.
American Lung Association radon test kit store: $18
Short-term kit $18, long-term $38. Not sold in New Jersey.
One test, or keep watching
One test: free
A lab kit from the program above. Good for a first look. One test is a snapshot, not a pattern.
Keep watching: Airthings Corentium Home 2, $179.99
New readings every day for as long as you own it. Good if you want to know, not guess. Price checked October 1, 2026.
If you buy through our Airthings link, we may earn a commission. You don't pay extra. Add your name and shipping, then enter ARS10-10OFF. The link does not apply the code by itself.