Best Radon Test Kits: Tipper's Picks for Every Budget
Radon is the second leading cause of lung cancer in the United States, responsible for around 21,000 deaths per year according to the EPA. It has no smell, no color, and no taste. The only way to know whether your home has a problem is to test it.
The good news: the test itself is not complicated, and it does not need to be expensive. A short-term kit that includes the lab fee runs about $15. That is a genuinely remarkable value for something that answers a question about your family's long-term health.
This guide covers the three types of radon test kits, when to use each one, and Tipper's specific picks at each price point. All products listed are EPA-approved. None are recommended based on commission rate.
Why testing is the only reliable answer
You might have already looked up your county on RadonLookup and seen an EPA zone classification. That is useful context, but it does not tell you what is happening inside your specific home.
Radon levels vary enormously from house to house, even on the same street. The variation comes down to foundation type, construction quality, soil composition under the slab, and ventilation. A Zone 1 home with good sealing might test at 1.5 pCi/L. A Zone 3 home with a cracked basement could test at 9 pCi/L. The only number that matters for your family is the one you get from testing your actual home.
The EPA's action level
If you have never tested your home, any kit on this list is the right first step. If you are buying a home, request a test as part of your inspection.
Short-term, long-term, and continuous: what is the difference
There are three categories of radon test. Each one answers a slightly different question, and which one you need depends on what you are trying to find out.
Short-term tests (2 to 7 days) use a passive charcoal canister you leave in the lowest livable area of your home, then mail to a certified lab. These are the most common, the least expensive, and the right starting point for most people. The limitation: they capture a snapshot rather than a seasonal average. The EPA recommends running them under closed-house conditions to capture a realistic high-end estimate.
Long-term tests (90 days to one year) use alpha track detectors that record radon exposure over months. The result is far more representative of your actual annual average. The tradeoff is time. For most people who have never tested, a short-term test first makes practical sense. Get a number quickly, then follow up with a long-term test if you want to confirm.
Continuous monitors (electronic, ongoing) measure radon levels in real time via a display or smartphone app. They do not replace a certified lab test for initial measurements, but they are excellent for ongoing monitoring after a mitigation system is installed.
| Short-term kit | Long-term kit | Continuous monitor | |
|---|---|---|---|
| Test duration | 48 hrs – 7 days | 90 days – 1 year | Ongoing |
| Typical cost | $15 – $30 | $25 – $50 | $100 – $200 |
| Lab required | Yes (included) | Yes (included) | No |
| Result accuracy | Snapshot | Seasonal average | Real-time trend |
| Best for | First test, home buying | Confirming annual exposure | Post-mitigation monitoring |
| EPA approved | Yes | Yes | Most models |
For a first test, start with a short-term kit. If it comes back above 4 pCi/L, follow up with a long-term test to confirm before spending on mitigation. If it comes back borderline (2 to 4 pCi/L), a long-term test is worth doing for a more accurate read.
Tipper's picks
Three categories, three picks. All EPA-approved. All include the lab fee where applicable. Prices fluctuate on Amazon, so check the link for the current figure.
Air Chek Radon Test Kit
~$15 – $20, lab fee included
It has been on the market for decades, the lab is NRPP-certified, and the instructions are clear enough that there is nothing to overthink. If you want a quick, reliable answer for under $20, this is it.
Accustar Alpha Track Kit (AT100)
~$25 – $40, lab fee included
If you want the number that reflects your home's actual annual average rather than a 48-hour snapshot, this is the one. Alpha track detectors are the standard method for long-term testing.
Airthings Wave Plus
~$150 – $200
The most user-friendly continuous monitor on the market. Connects to an app, shows radon trends over time, and Tipper has one in his own basement. Right tool for post-mitigation monitoring.
Not sure which to buy? If you have never tested your home, start with the Air Chek short-term kit. It answers the most important question first: do you have a problem? Everything else follows from that result.
What to look for when buying any radon test kit
Not all radon test kits are equally reliable. Before clicking buy on anything, run through this checklist. All three picks above clear every item on it.
Some kits list a low price and charge separately for lab analysis. The lab is the whole point. Confirm before buying.
These are the two EPA-recognized certification programs. A certified lab follows standardized protocols. If the kit does not mention certification, skip it.
The canister or alpha track detector itself should be listed as EPA-approved. Major brands like Air Chek and Accustar are. Unknown sellers are not worth the risk.
Short-term tests require windows and doors closed for 12 hours before and during the test. Any kit worth buying explains this clearly. Vague instructions produce vague results.
Before placing the kit, read the instructions once through. The most common mistake is placing the kit in the wrong location: too close to a window, in a crawl space, or on an upper floor rather than the lowest livable level.
What to do with your results
Your lab report will give you a number in pCi/L. Here is what it means and what to do next.
Well below the EPA action level. Good news.
No action needed. Retest every two years or after major renovations.
Below the EPA action level, but worth watching.
Consider a long-term test for a more accurate seasonal average. Mitigation is optional but reasonable, especially in bedrooms.
At or above the EPA action level. Fix your home.
Run a follow-up long-term test to confirm, then hire a certified mitigation contractor. A sub-slab depressurization system typically brings levels below 2 pCi/L.
Significantly elevated. Take action sooner rather than later.
You do not need a long-term confirmation test at this level. Contact a certified contractor and schedule mitigation.
If your test comes back above 4 pCi/L, Tipper's practical recommendation is to run one confirming long-term test before spending on mitigation. Radon levels fluctuate, and a single short-term reading during unusual weather or ventilation conditions could read higher than your real average. A 90-day test removes that uncertainty. If the long-term test also comes back above 4, fix it.
Mitigation systems installed by a certified contractor typically cost $800 to $2,000 depending on home size, foundation type, and local labor rates. They are highly effective. Most homes drop to below 2 pCi/L after installation. A reputable contractor will do a follow-up test to confirm it is working.
Find contractors in your area
Got your result? Search your county on RadonLookup to see how your home compares to the county average and neighboring counties. Search your county.