What’s Considered a High Radon Test Result?

Environmental Protection Agency (EPA) guidelines set the recommended action level for radon levels in homes and buildings at four picocuries per liter or higher; if your test result shows levels higher than this threshold, the EPA advises taking immediate steps to lower it.

Radon levels below 4 pCi/L should still be taken seriously as there is no safe level of exposure. According to EPA estimates, lung cancer risk increases approximately 16% per 1 pCi/L increase. Therefore, while 4 pCi/L levels may represent reduced risks it is still important to take steps as much as possible in order to lower them further.

If a radon test result shows levels of 10 pCi/L or above, the Environmental Protection Agency recommends taking immediate measures to reduce them as these levels represent an imminent health risk. As general guidance goes, higher radon exposure increases your chances of lung cancer development.

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