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What is Radon?

Radon is a hazardous, naturally occurring gas that results from the decay of trace amounts of uranium found in the earth's crust. Odorless and invisible, radon has been classified (by the Environmental Protection Agency) as a carcinogen since 1988, and is the leading cause of cancer among nonsmokers in of the U.S. Because radon is an unstable gas, it breaks down and dissipates quickly in the open air. Dangerous levels of radon can accumulate inside a house, however. The soil under and around the house is by far the largest source of radon gas, but it is also present in well water, building materials, public water supplies and outdoor air (see pie chart).

To schedule a radon mitigation test and eradicate this gas from your home, trust a local National Radon Defense dealer for proven service. Find a certified dealer near you!

How is radon measured?

Radon is measured in units called picocuries per liter (pCi/L). A picocurie is extremely small — just one trillionth of a curie, the amount of radioactivity emitted by a single gram of radium. The (EPA) has established 4 pCi/L as the standard for indoor air. A house that tests out at levels higher than 4 pCi/L should undergo radon mitigation to reduce radon levels.

radon pie chart


To see if your home qualifies for radon mitigation, schedule a radon test with National Radon Defense. Our dealers will help ensure your home's safety. Get started today

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