KS · Johnson County
Radon Test Kits in Overland Park, KS
If you are in Overland Park, the verified walk-in kit is still the Johnson County Extension office in Olathe, not a shop inside Overland Park. The address is 11811 S. Sunset Drive, Suite 1500. Kits are $15 and are pickup only. The no-cost Kansas mail kit is paused. A short-term mail kit from Kansas State University is $20.
We checked this on October 1, 2026. Confirm the official page before you travel. Prices and stock change.
Where to get a kit
Johnson County Extension radon kits: $15
Johnson County Extension sells a do-it-yourself radon kit for $15 at its Olathe office. You have to pick it up.
Buy in person (call to confirm stock):
- Johnson County Extension office, 11811 S. Sunset Drive, Suite 1500, Monday to Friday, 8:30 a.m. to 5 p.m., 913-715-7000
Kansas Radon Project no-cost kit
No-cost kits for Kansas residents. Mailing is paused. You can join the waitlist.
Questions: Kansas Radon Program hotline, 1-800-693-5343.
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.
One test, or keep watching
One test: $15
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.
Partners
K-State Research and Extension, Johnson County. Lab fee and return postage included.
Kansas Radon Project. No-cost kits for Kansans. Mailing was paused on October 1, 2026. What to do while mailing is paused