Best Radon Test Kits: EPA-Listed Options for Home Testing
Radon test kits use activated charcoal canisters or alpha track detectors to capture radon over a defined testing period. After exposure, you mail the kit to an accredited laboratory which measures the radon concentration and reports results. These are the most affordable way to get a certified radon measurement — essential for first-time testing, real estate transactions, and confirming the results of continuous monitors. We recommend NRPP or NRSB-accredited lab options only.
Affiliate Disclosure
HomeAirWise participates in the Amazon Associates program and other affiliate partnerships. When you click a product link and make a purchase, we may earn a small commission at no additional cost to you. This helps us maintain the site and continue providing independent research and recommendations. Read our full disclosure.
Quick Picks by Budget
Best value for money
AccuStar Charcoal Short-Term Radon Test Kit
$14.99
Best performance & features
First Alert Radon Gas Test Kit, RD1
$18.98
Top-tier performance
PRO-LAB Long-Term Alpha Track Radon Test Kit
$32.99
EPA Advisory: The EPA recommends that all homes be tested for radon. If your result is 4.0 pCi/L or higher, the EPA recommends taking mitigation action. Contact a certified radon contractor — do not rely on air purifiers or ventilation alone to reduce radon levels.
Quick Comparison
Scroll right on mobile →| Spec | #1 PickFirst Alert Radon Gas Test Kit, RD1First Alert | Pro Lab Radon Test Kit (2-Pack)Pro Lab | AccuStar Charcoal Short-Term Radon Test KitAccuStar Labs | PRO-LAB Long-Term Alpha Track Radon Test KitPRO-LAB |
|---|---|---|---|---|
| Price | $18.98 | $22.99 | $14.99 | $32.99 |
| Rating | 4.3(10,175 reviews) | 4.3(1,876 reviews) | 4.4(8,500 reviews) | 3.8(124 reviews) |
| Test Type | Short-term charcoal canister | Short-term charcoal canister | Charcoal canister (passive, open-face) | Alpha track detector (CR-39 film) |
| Exposure Duration | 48–96 hours | 48–96 hours | — | — |
| Lab | EPA-listed (Alpha Energy Laboratories), NRPP-certified | NRPP-accredited (Pro Lab) | — | — |
| Results | Within 72 hours of lab receipt (email) | 5–7 business days | — | — |
| EPA Status | Listed under Radon Gas Measurement Proficiency Program | — | — | — |
| Included | Canister, instructions, return envelope (postage not included) | — | — | — |
| Single Use | Yes | — | — | — |
| Quantity | — | 2 test kits | — | — |
| Test Duration | — | — | 48–96 hours | — |
| Analysis Method | — | — | Gamma spectrometry | Microscopic track counting |
| Results Turnaround | — | — | 2–3 business days after lab receipt | 5–7 business days after lab receipt |
| Lab Fee | — | — | Included in purchase price | Included |
| Certification | — | — | NRPP, AARST-NRPP | NRPP, AARST-NRPP certified laboratory |
| Valid In | — | — | All US states except New Jersey | — |
| Minimum Test Duration | — | — | — | 91 days |
| Maximum Test Duration | — | — | — | 365 days |
| Buy | Check Price | Check Price | Check Price | Check Price |
First Alert
First Alert Radon Gas Test Kit, RD1
$18.98
EPA-listed short-term charcoal radon test. Place for 48–96 hours, mail to lab, get email results in 72 hours. Amazon's Choice with 10K+ reviews.
Pros
- Most affordable EPA-listed home radon test
- Lab fees included (except NJ); results emailed within 72 hours
- Amazon's Choice with 10,000+ verified reviews
Cons
- One-time test only — not continuous monitoring
- Must provide postage to return kit to lab
Prices updated regularly. As an Amazon Associate we earn from qualifying purchases.
Pro Lab
Pro Lab Radon Test Kit (2-Pack)
$22.99
Two short-term radon test kits in one pack. Ideal for testing two floors or doing a duplicate test for EPA-recommended confirmation.
Pros
- 2 kits for price of ~1.5 single kits
- Pro Lab is NRPP-accredited with decades of experience
- Good for EPA-recommended confirmation testing
Cons
- Still a short-term snapshot test
- Closed-house conditions required
Prices updated regularly. As an Amazon Associate we earn from qualifying purchases.
AccuStar Labs
AccuStar Charcoal Short-Term Radon Test Kit
$14.99
The most widely used EPA-recognized short-term radon test in the US, trusted by home inspectors and real estate professionals. Activated charcoal canister delivers accurate 48–96 hour results with certified lab analysis included.
Pros
- Most trusted lab brand for real estate radon testing
- EPA-recognized and NRPP-certified methodology
- Prepaid lab return envelope included — no extra fees
Cons
- Single-use — cannot be re-tested or reused
- Measures only a 48–96 hour window (not long-term average)
Prices updated regularly. As an Amazon Associate we earn from qualifying purchases.
PRO-LAB
PRO-LAB Long-Term Alpha Track Radon Test Kit
$32.99
A 90-day alpha track radon test for the most accurate long-term radon measurement. Captures seasonal fluctuations that short-term tests miss — the method recommended for definitive radon assessment before major decisions.
Pros
- Most accurate method for long-term radon measurement
- Captures seasonal radon fluctuations short-term tests miss
- Integrates readings over 91–365 days for true average
Cons
- Results take 91+ days — not suitable for time-sensitive transactions
- Lower overall review count than short-term kits
Prices updated regularly. As an Amazon Associate we earn from qualifying purchases.
Frequently Asked Questions
What is closed-house testing?
Closed-house conditions require keeping all exterior windows and doors closed — except for normal entry and exit — for 12 hours before and throughout the test period. This simulates the conditions where radon is most likely to accumulate and provides a worst-case reading, which is what EPA protocols require for real estate testing.
Short-term vs. long-term test kits: which should I use?
Short-term tests (2–90 days) provide a quick initial reading. If your result is at or above 4 pCi/L, the EPA recommends confirming with a second short-term test or a long-term test (90+ days) before investing in mitigation. Long-term tests more accurately reflect your actual annual average exposure.
How accurate are home radon test kits?
EPA-listed charcoal canister kits have a margin of error of approximately ±20–30% for short-term tests. They are reliable for identifying whether your home is above or below the EPA action level, but a single test result should not be treated as an exact measurement. Follow up with a second test if your result is near the action level.