Is A Radon Level Of 2.4 Safe?

Is A Radon Level Of 2.4 Safe? FAQs: Acceptable Radon Levels. What constitutes an acceptable or safe radon level? According to the EPA, the maximum “acceptable” level of radon is 4.0 pCi/L, but even that level is not “safe”, per se. The EPA strongly recommends you consider radon mitigation between levels 2.0 and 4.0. Is