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Best Radon Test Kits for 2026 — Tested & Reviewed

Radon is a colorless, odorless radioactive gas that seeps into homes through cracks in the foundation — and it is the #1 cause of lung cancer among non-smokers. According to the EPA, radon is responsible for approximately 21,000 lung cancer deaths in the United States every year. Because you cannot see, smell, or taste radon, testing your home is the only way to know whether you and your family are at risk.

In this guide, we cover the best mail-in radon test kits and continuous digital monitors available in 2026. We have researched and compared every major option on the market, and we give you honest pros and cons so you can pick the right test for your situation — whether you are buying a home, screening for the first time, or looking for ongoing monitoring.

Important note for home buyers and sellers: If you are involved in a real estate transaction, you must use a certified mail-in test kit. The Conference of Radiation Control Program Directors (CRCPD) advises that consumer electronic radon monitors are not accepted for real estate transactions. Only certified short-term charcoal or electret test kits processed by an accredited lab meet the standard required for home inspections. Keep this in mind as you read the reviews below.

Quick Pick — Which Test Should You Get?

Best Short-Term Radon Test Kits (Mail-In)

Short-term radon test kits are the fastest and most affordable way to get a snapshot of your home’s radon level. These charcoal-based or electret kits are placed in the lowest lived-in level of your home for 2–7 days, then mailed to a certified lab for analysis. All of the kits below are available on Amazon and include prepaid return shipping and lab analysis fees unless otherwise noted.

1. First Alert RD1 Radon Test Kit

Price: $15–19  |  Where to buy: Amazon

What’s included: 1 single-use activated charcoal test kit, prepaid return mailer, lab analysis fee included.

Pros: Extremely affordable and widely available. Simple instructions that anyone can follow. Results are typically available within a few days of the lab receiving the kit. A great option for first-time screening on a tight budget.

Cons: Only includes one detector, so you cannot run a simultaneous duplicate test (which is recommended for real estate transactions). The charcoal canister must be mailed back promptly to ensure accuracy.

Best for: Budget-conscious homeowners who want a quick initial screening of their home’s radon level.

⚠️ Buyer Tip: When purchasing the PRO-LAB kit on Amazon, make sure you buy the version that includes lab fees in the price (ASIN B08VBPGV82, currently ~$30–35). An older listing (ASIN B000BD6D20) charges a separate lab fee of $20–40 per detector on top of the purchase price — making it significantly more expensive than it appears. The link above goes to the correct all-inclusive version.

2. Air Chek Radon Test Kit

Price: $19.55  |  Where to buy: Amazon

What’s included: 1 short-term charcoal test kit, prepaid return envelope, lab analysis fee included.

Pros: One of the most trusted names in radon testing. Processed by Air Chek’s own NRPP-listed lab. Fast turnaround — results are usually emailed within a few business days. Slightly more refined packaging and instructions compared to the First Alert RD1.

Cons: Single detector only. Marginally more expensive than the First Alert RD1 for similar functionality.

Best for: Homeowners who want a reliable, no-nonsense single test from a well-known radon testing laboratory.

3. PRO-LAB Dual Real Estate Radon Test Kit

Price: $30–35  |  Where to buy: Amazon

What’s included: 2 charcoal test canisters (for side-by-side duplicate testing), prepaid return mailer, lab analysis for both detectors included.

Pros: Specifically designed for real estate transactions. The dual-detector format satisfies the requirement for duplicate testing during home inspections. Lab fees are included in the purchase price, so there are no surprise costs. The EPA and most state programs recommend running two simultaneous tests for the most reliable results.

Cons: More expensive than a single-kit option. Results depend on how quickly you return the kit after the exposure period ends.

Best for: Home buyers, sellers, and real estate professionals who need a certified test that meets real estate radon testing requirements.

⚠️ Watch out for the wrong PRO-LAB listing. There is an older PRO-LAB kit on Amazon (about $12) that does NOT include lab fees — you will get hit with a $20-per-detector charge after the fact. Make sure you buy the newer listing linked above, which includes all lab fees in the purchase price.

4. AccuStar PicoCan 400 Dual Radon Test Kit

Price: ~$30–40  |  Where to buy: Amazon

What’s included: 2 activated charcoal canisters, prepaid mailer, lab analysis fees included.

Pros: Another excellent option for duplicate short-term testing. Processed by AccuStar Labs (NRPP and NRSB certified). Compact canister design is easy to deploy. Suitable for real estate use.

Cons: Slightly less widely available than the PRO-LAB kit. Some users have reported occasional shipping delays from third-party sellers.

Best for: Anyone who wants a dual-canister short-term test from one of the country’s leading radon laboratories.

5. Leaping Lynx Radon Test Kit

Price: ~$15–25  |  Where to buy: Amazon

What’s included: 1 short-term charcoal test kit, prepaid return envelope, lab analysis included.

Pros: Affordable and straightforward. Newer brand with competitive pricing. Includes everything you need to complete a short-term test in one box.

Cons: Less established brand compared to First Alert or Air Chek. Single detector only — not ideal for real estate transactions. Limited long-term track record.

Best for: Homeowners on a budget looking for a quick, inexpensive radon screening.

Best Long-Term Radon Test Kits

While short-term tests give you a useful snapshot, radon levels in your home can fluctuate significantly from day to day and season to season. A long-term test — one that remains deployed for 91 days or more — provides a much more accurate picture of your home’s annual average radon concentration. If you are not in a rush (for example, you are not in the middle of a home sale), a long-term test is the gold standard for understanding your true exposure.

1. AccuStar AT-100 Long-Term Alpha Track Radon Test Kit

Price: ~$35–39  |  Where to buy: Amazon

What’s included: 1 alpha track detector, prepaid return mailer, lab analysis included.

Pros: The #1 long-term radon test recommended by Consumer Reports. Uses alpha track detection technology, which is specifically designed for extended exposure periods. Deploy for 91 days to 1 year for the most reliable annual average. Processed by AccuStar Labs, one of the most respected radon testing labs in the country (NRPP and NRSB certified).

Cons: Requires patience — you will not get results for at least 3 months. Not suitable for real estate transactions where a quick turnaround is needed.

Best for: Homeowners who want the most accurate long-term measurement of their home’s radon level.

2. Radonova Radtrak³ Long-Term Radon Test Kit

Price: ~$30–45  |  Where to buy: Amazon or sosradon.org (available for ~$30)

What’s included: 1 alpha track detector, prepaid return mailer, lab analysis included.

Pros: Manufactured by Radonova, a globally recognized radon measurement lab. ISO 17025 accredited lab analysis. Compact, easy-to-use design. Also available through sosradon.org at a lower price point.

Cons: Like all long-term tests, requires a minimum 91-day deployment. Slightly less well-known in the U.S. market compared to AccuStar, though internationally it is a leading brand.

Best for: Homeowners looking for an internationally accredited long-term alpha track test, especially if ordering through sosradon.org at a discounted price.

Best Continuous Radon Monitors (For Homeowners, NOT Real Estate)

Continuous radon monitors are electronic devices that measure radon levels in real time and display readings on a screen or app. They are excellent for homeowners who want ongoing visibility into their home’s radon levels — for example, to verify that a radon mitigation system is working properly or to track seasonal fluctuations. Here are the best options available in 2026.

1. Airthings Corentium Home 2 (Model 2980)

Price: $179  |  Where to buy: Amazon | Airthings Store (use code RADONSAFETY-10OFF for 10% off)

Pros: One of the most popular and well-reviewed consumer radon monitors on the market. Simple, battery-powered device with a clear e-ink display showing short-term, long-term, and daily radon readings. No Wi-Fi or app required — just place it and read the screen. Excellent battery life (up to 2 years on standard AA batteries). Portable and easy to move between rooms.

Cons: No smartphone app connectivity or smart home integration (for that, you would need the Airthings View or Wave series). Does not log historical data to the cloud. Takes about 7 days to produce a reliable long-term reading.

Best for: Homeowners who want a reliable, set-it-and-forget-it radon monitor without the complexity of app connectivity.

2. Airthings View Plus

Price: $329  |  Where to buy: Amazon | Airthings Store (use code RADONSAFETY-10OFF for 10% off)

Pros: Premium all-in-one indoor air quality monitor that tracks radon, CO2, humidity, temperature, VOCs, and air pressure. Connects to Wi-Fi and the Airthings app for real-time data, historical charts, and notifications. Beautiful e-ink display with color-coded air quality indicators. Can integrate with smart home platforms like IFTTT, Google Home, and Amazon Alexa.

Cons: The most expensive option on this list. Overkill if you only need radon monitoring. Requires Wi-Fi for full functionality.

Best for: Tech-savvy homeowners who want comprehensive indoor air quality monitoring in a single device, with radon as a key metric.

3. Ecosense RadonEye RD200

Price: $163–179  |  Where to buy: Amazon

Pros: Extremely fast and sensitive radon detection — produces a reliable initial reading in as little as 10 minutes and stabilizes within 60 minutes. Connects to a smartphone app via Bluetooth for real-time data and historical graphs. Highly accurate pulsed ion chamber sensor. Frequently recommended by radon professionals for its sensitivity and speed.

Cons: Requires a constant power source (plugs into an outlet via USB). The app interface, while functional, is not as polished as the Airthings app. No built-in Wi-Fi — uses Bluetooth only.

Best for: Homeowners and radon professionals who want the fastest, most sensitive consumer radon readings available.

4. Ecosense EcoBlu Radon Monitor

Price: $99  |  Where to buy: Amazon

Pros: The most affordable continuous radon monitor on this list. Compact and simple design with Bluetooth app connectivity. A solid entry point for homeowners who want continuous monitoring without spending $170 or more. Good accuracy for the price point.

Cons: Less sensitive than the RadonEye RD200. Takes longer to produce stable readings. No on-device display — you must use the app to check readings. Limited advanced features compared to pricier alternatives.

Best for: Budget-conscious homeowners who want continuous radon monitoring at an entry-level price.

5. SunRADON Lüft Continuous Radon Monitor

Price: $169–199  |  Where to buy: SunRADON.com (use code HEALTHYAIR for a discount)

Pros: Made by SunRADON, a company that specializes in radon mitigation fans and monitoring equipment. Designed specifically for pairing with radon mitigation systems. Wi-Fi enabled with app and web dashboard for remote monitoring. Can send alerts if radon levels spike above a set threshold — ideal for verifying your mitigation system is working.

Cons: Less commonly reviewed by consumers compared to Airthings and Ecosense products. Primarily marketed toward homeowners with existing mitigation systems rather than first-time testers. Availability may vary.

Best for: Homeowners with a radon mitigation system who want a dedicated monitor to verify their system is keeping levels low.

How to Test Your Home for Radon (Step by Step)

Testing your home for radon is straightforward. Here is a simple step-by-step process that anyone can follow.

Step 1: Buy a test kit. Choose a short-term mail-in kit (like the ones reviewed above) or a continuous monitor depending on your needs. For a quick initial screening, a short-term kit is the easiest option.

Step 2: Place the kit in the lowest lived-in level of your home. This is typically the basement or ground floor. Set the kit on a table or shelf, at least 20 inches off the floor and away from exterior walls, windows, doors, and areas of high humidity. Do not place it in a kitchen, bathroom, or laundry room.

Step 3: Maintain closed-house conditions. During the test period (typically 2–7 days for short-term kits), keep all windows and exterior doors closed as much as possible. Normal entry and exit is fine, but avoid leaving windows open or running whole-house fans. This ensures the test captures an accurate reading.

Step 4: Mail the kit back to the lab. Once the exposure period is complete, seal the kit according to the instructions and mail it in the prepaid envelope provided. Most labs will have your results ready within a week of receiving the kit.

Step 5: Review your results. You will receive your radon level in picocuries per liter (pCi/L). The EPA recommends taking action if your level is 4.0 pCi/L or higher. Even levels between 2.0 and 4.0 pCi/L may warrant follow-up testing or mitigation. For a detailed explanation of radon levels and what they mean, visit our radon testing guide.

What to Do If Your Radon Level Is High

If your test results come back at 4.0 pCi/L or above, the EPA strongly recommends installing a radon mitigation system. There is no need to panic — elevated radon is extremely common and can be fixed effectively in almost any home.

The most common solution is a sub-slab depressurization system, which involves a licensed contractor installing a pipe and fan to vent radon gas from beneath your foundation to the outside. The typical cost of professional radon mitigation ranges from $800 to $1,500 depending on your home’s foundation type and local labor rates. You can learn more about costs on our radon mitigation cost guide.

The best next step is to get a free, no-obligation quote from a certified radon mitigator in your area. We have partnered with licensed professionals across the country to make this easy for you.

Frequently Asked Questions

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