Testing
Free radon test kits by state
18 of the 50 states and DC say they give radon test kits away, 9 to any resident and 9 with limits on who, where or how many, and 8 more sell kits at low cost. Choose your state 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.
- Updated October 2026
- Each state program's own page, last checked November 3, 2026
- 51 state and DC radon programs
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.
Programs giving kits away
18 of 51
Choose a state to see what its radon program offers, in its own words.
- State programBy state18 programs give kits away
- Retail kit$10 to $15A kit, Mississippi's published figure
- Professional test$100 to $200A test, Virginia's published figure
Choose a state above to see its program, its phone number, its published price and the date its page was checked.
- Free kitsDE, DC, FL, ID, MO, NH, OH, TN, WV9
- Free, with limitsMD, NM, NC, OR, PA, SC, SD, TX, WA9
- Low-cost kitsCA, CO, GA, IN, IA, MT, NV, NY8
- Through local health departmentsCT, NE, NJ, WI4
- PausedND1
- Free water kitsVT1
- Not statedAL, AK, AZ, AR, IL, KS, KY, LA, ME, MA, MI, MN, MS, OK, RI, UT, VA, WY18
- No state pageHI1
| Row | Figure (states) |
|---|---|
| Free kits | 9 |
| Free, with limits | 9 |
| Low-cost kits | 8 |
| Through local health departments | 4 |
| Paused | 1 |
| Free water kits | 1 |
| Not stated | 18 |
| No state page | 1 |
Every way to get a radon test, at published prices
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
- 9
- Free kits with limits
- 9
- Low-cost or discounted kits
- 8
- Through local health departments or centers
- 4
- Paused or out of kits
- 1
- Free well water kits
- 1
- Not stated on the page we checked
- 18
- 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
Step 1 of 5:
Follow the kit's own instructions
Each device has its own steps; follow the ones that come with your kit.
Step 2 of 5:
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.
Step 3 of 5:
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.
Step 4 of 5:
Leave it for the full time
Every radon test should run for at least 48 hours; some devices need longer.
Step 5 of 5:
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
- November 3, 2026
- Entry taken from a state announcement
- 1
What changes it
What changes your result
- Your state's radon programSome states give kits away, some sell them at low cost, and some say nothing about kits on the page we checked; the finder shows each state's own words.
- Limits on free kitsA free kit may be one per household, for some residents or areas only, seasonal, or while a limited supply lasts, as the state's sentence says.
- Local health departmentsSome states send residents to local or county health departments or regional centres, some of which give kits away.
- Retail and hardware storesKits are sold online and in many retail, hardware and home improvement stores; a short-term charcoal kit is a published $10 to $15.
- Lung associationsSome local or state American Lung Associations sell low-cost kits, and some states point residents to them.
- Kansas State's national serviceThe National Radon Program Services at Kansas State University sells test kits online and by phone at 1-800-SOS-RADON.
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.