Radon Levels in Philadelphia County, Pennsylvania
The average indoor radon level in Philadelphia County is 2.4 pCi/L — about 1.8× the U.S. average of 1.3 pCi/L, and below the EPA action level of 4.0 pCi/L (CDC National Environmental Public Health Tracking Network, 2008–2017). While the county average is below the action level, radon varies home to home — elevated readings still occur throughout Philadelphia County, so the EPA recommends every home be tested.
Philadelphia County Radon, in Context
Source: CDC National Environmental Public Health Tracking Network — mean pre-mitigation radon level in tested buildings, Pennsylvania, 2008–2017. Classification: Moderate (2-4 pCi/L).
What This Means for Philadelphia County Homeowners
A below-action-level county average does not mean your home is safe — radon depends on your home's foundation, soil, and construction. Plenty of homes in lower-average counties still test well above 4.0 pCi/L. A short-term test kit ($15–30) is the only way to know. Either way, Pennsylvania Radon Experts routes you to a verified Pennsylvania partner contractor for testing or mitigation.
Cities we serve in Philadelphia County
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Test or Mitigate Radon in Philadelphia County
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