Radon test kits

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Radon test kits

What's behind our radon test kit Ratings?

Experts at our National Testing and Research Center tested 11 models in radon test kits to see which ones perform best.

We look for:

Overall score
Overall score is based on the accuracy and the reliability of the radon kits. The displayed score is out of a total of 100 points.
Accuracy
Accuracy measures how closely results matched those from the calibrated radon monitor we used as a benchmark. Those rated poor were off by almost 40 percent; ones rated fair, by less than 25 percent.
Reliability
Reliability indicates how similar the readings were for several samples exposed under identical conditions. Those rated fair varied by more than 10 percent and up to 15 percent; those rated very good, by less than 8 percent.

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Recommended radon test kits

Recommended radon test kits are standout choices with high scores. They include CR Best Buys, which offer exceptional value. When narrowing your choices, weigh features, price, and attributes that matter to you.

Recommended radon test kits

Radon test kit buying guide

To find the radon test kit that is right for you, read our expert advice on which features to consider and how to find the best value.

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In addition to finding Ratings for the latest models, you can now shop online using an ad-free interface where you can buy radon test kits in a safe-shopping environment.

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After smoking, radon is the top cause of lung cancer in this country. Overexposure is symptom-free, and once you're exposed, there's no treatment. If you're looking for information about radon test kits, Consumer Reports is your best resource. Consumer Reports' radon test kit reviews will give you honest buying advice that you can trust. Use our radon test kit buying guide to discover which features are most important to consider. We also provide unbiased Ratings and radon test kit reviews to help you choose the best radon test kit for your needs.

Ratings & recommended radon test kits

Radon test kits (11)

The Ratings rank radon test kit by overall performance.

Radon test kit buying guide

After smoking, radon is the top cause of lung cancer in this country--it's responsible for about 21,000 deaths a year, according to the Environmental Protection Agency. Overexposure is symptom free, and once you're exposed, there's no treatment. Detecting radon and fixing the problem are far easier and less expensive than dealing with lead.

Radon is measured in pico Curies per liter (pCi/L); 1.3 is considered the national average indoor level. Although 4 pCi/L is the recommended EPA action level, the agency also suggests that you consider remediation at a level between 2 and 4 pCi/L.

We tested seven short-term (2- to 7-day) radon kits, three long-term (90-day) kits, and a digital-readout meter using experts at two labs. Here's what we found.

Long-term radon kits are more accurate. The radon level can vary significantly from day to day. Sampling the level for 90 days or more gives you a more accurate idea of the average radon level in your home. If you need fast results, only one short-term radon kit, the RTCA charcoal canister, was accurate enough for us to recommend. But you should still confirm its results with a long-term test. The $120 Safety Siren Pro digital meter can be used for short- or long-term testing.

Some radon kits underreported. The Accustar CLS 100i and the Kidde short-term radon kits underreported radon levels by almost 40 percent.

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