Short answer
19 of the 50 states and DC say they give radon test kits away, 10 to any resident and 9 with limits on who, where or how many, and 8 more sell kits at low cost. Choose your state below to see its offer, a link to its radon program and the date we checked; where a program's page says nothing about kits, we say so.
Kit finder
Find your state's free or low-cost radon kit
Choose your state to see what its radon program offers in test kits, a link to the program and the date we last checked. Your state may offer free or discounted test kits, and local or county health departments sometimes have free kits too.
Or pick a state from the groups below.
Free kits for residents
10The state's page says it gives free kits to residents.
Free kits with limits
9Free, but only for some residents, some areas, a season or while a limited supply lasts.
Low-cost or discounted kits
8The state sells or subsidizes kits, or points to a low-cost source.
Through local health departments or centers
4The state sends you to local health departments or regional centers, some of which give kits away.
Paused or out of kits
3The state says its free kits are unavailable for now.
Free well water kits
1Free kits for testing well or spring water, not air.
Not stated on the page we checked
15The page we read does not mention free or discounted kits. Ask the program directly.
No state radon page found
1We could not find a state radon page. Use EPA's state contacts or a national source.
Summary
What the states say, at a glance
Each state is filed under one group from what its program page says about kits. A state whose page says nothing about kits is filed as not stated, never as having no program, so ask the program directly before you rule one out.
- Free kits for residents
- 10
- Free kits with limits
- 9
- Low-cost or discounted kits
- 8
- Through local health departments or centers
- 4
- Paused or out of kits
- 3
- Free well water kits
- 1
- Not stated on the page we checked
- 15
- No state radon page found
- 1
Beyond your state
Other places to get a radon test kit
The National Radon Program Services at Kansas State University sells test kits online and by phone at 1-800-SOS-RADON (1-800-767-7236). Kits are also available from some local or state American Lung Associations, from some home improvement stores, and online or in many retail and hardware stores.
Testing
Use the kit so the result counts
Follow the kit's own instructions
Each device has its own steps; follow the ones that come with your kit.
Close up the house first
For a test of two or three days, close your windows and outside doors at least 12 hours before beginning the test, and keep them closed as much as possible during it.
Pick the right spot
The lowest lived-in level of the home, at least 20 inches above the floor, away from drafts, high heat, high humidity, and exterior walls.
Leave it for the full time
Every radon test should run for at least 48 hours; some devices need longer.
Send it to the lab
Results usually come back within a few weeks.
Up to date
Keeping the finder current
Programs run out of kits and restart them. Each entry shows the date we last checked the state's program, and a state's group changes only when its program changes. Where a program page says nothing about kits but the state has announced kits elsewhere, as North Carolina's health department did on December 30, 2025, the entry follows that announcement.
- State and DC programs in the finder
- 51
- Most recent check of a program page
- September 25, 2026
- Entry taken from a state announcement
- 1
FAQ
Free radon test kit questions
Are radon test kits free?
In many states, yes. Your state may offer free or discounted test kits; the finder above shows what each state's program offers.
How do I get a free radon test kit?
Choose your state above and follow the link to its program. Local or county health departments sometimes have free kits too.
Why does my state say it is out of kits?
Programs have a set supply. Alaska, Alabama and North Dakota say their free kits are paused or used up for now; check back, or buy a kit.
Are free radon kits as good as ones I buy?
What matters is the device and how you use it, not what you paid. Use a device from a qualified laboratory, and follow the kit's instructions.
Is there a national free radon test kit program?
Not a free one that we know of. The National Radon Program Services at Kansas State University sells test kits online and by phone at 1-800-SOS-RADON (1-800-767-7236).
Can I get a free kit to test my well water?
In Vermont, residents can join the state health department laboratory's study on radon in water and receive free test kits for a well or spring.