MT
Radon Test Kits in Montana
Cascade County sells a $25 long-term kit in Great Falls. Gallatin County (Bozeman) and Ravalli County (Hamilton) sell kits; call for price. Gallatin is at a temporary office, so call 406-582-3120 first.
We checked this on October 1, 2026. Confirm the official page before you travel. Prices and stock change.
Where to get a kit
Gallatin County low-cost radon kits
The Gallatin City-County Health Department sells low-cost short-term and long-term radon kits in Bozeman. Call for price.
Buy in person (call to confirm stock):
- Environmental Health Services, temporary address, 400 E. Babcock Street, 406-582-3120
Cascade County Radon Test Kits: $25
Cascade County sells a $25 long-term radon test kit at its Great Falls health department office.
Buy in person (call to confirm stock):
- Cascade City-County Health Department, 325 2nd Ave North, 406-454-6950
Ravalli County Radon Test Kits
Ravalli County sells short and long term radon kits in Hamilton; call (406) 375-6565 for current pricing.
Buy in person (call to confirm stock):
- Ravalli County Environmental Health, 215 South 4th, Suite D, Monday-Friday, 8 a.m.-12 p.m., 1 p.m.-5 p.m., 406-375-6565
One test, or keep watching
One test: $25
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.