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Ask TreeHugger: What Do Radon Tests Mean?

Date Published: 02/20/2007 [Source]

I am selling my house and in this process, my house was tested for radon using a mail-in kit. The buyers got the radon results back and they show that my house is just below the EPA recommended limit. The buyers want me to install equipment to reduce radon in my home.

To know how your home fits within the EPA guidelines, you need to know the average radon levels in your home over a long time period, as EPA developed these guidelines based on life time exposures to radon. Since your radon levels were measured using a mail-in kit, my guess is that your radon test was performed over a couple of days. Your test results near the 4 pCi/L action level indicate that it is possible for your home to have long-term average radon levels that need remediation (or lowering).