KS · Johnson County
Radon Test Kits in Olathe, KS
Johnson County Extension, 11811 S. Sunset Drive, Suite 1500: $15 kits, Monday to Friday, 8:30 a.m. to 5 p.m. Phone 913-715-7000. Cash, check to Johnson County Extension Council, or card (extra fee).
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