Pennsylvania radon levels by county

Pennsylvania Radon Levels by County

Pennsylvania has some of the highest indoor radon in the country — and it varies sharply by county. Below is the measured average for every Pennsylvania county we serve (CDC test data, 2008–2017), compared to the U.S. average of 1.3 pCi/L and the EPA action level of 4.0. Find your county to see what's typical and what to do next.

County	Avg radon (pCi/L)	vs U.S.	Status
Lebanon County →	14.8	11.4×	Above action level
York County →	13.2	10.2×	Above action level
Centre County →	12.9	9.9×	Above action level
Dauphin County →	11.9	9.2×	Above action level
Lancaster County →	11.1	8.5×	Above action level
Berks County →	10.7	8.2×	Above action level
Lehigh County →	10.4	8×	Above action level
Northampton County →	9.6	7.4×	Above action level
Blair County →	7.2	5.5×	Above action level
Allegheny County →	5.7	4.4×	Above action level
Lackawanna County →	5.6	4.3×	Above action level
Luzerne County →	5	3.8×	Above action level
Erie County →	4.9	3.8×	Above action level
Philadelphia County →	2.4	1.8×	Below action level

Source: CDC National Environmental Public Health Tracking Network — mean pre-mitigation radon level in tested buildings, Pennsylvania, 2008–2017. Every home should be tested regardless of county average.

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