Radon in Clearfield County, Pennsylvania
Radon levels in Clearfield County, Pennsylvania are high based on EPA Zone 1. 1 city has documented radon testing data through PA Radon Hub. The EPA action level of 4 pCi/L is exceeded in approximately 30.2% of tested homes in this region.
Clearfield County is classified as Zone 1 on the EPA Map of Radon Zones. This page aggregates radon risk data for every PA Radon Hub city in the county, explains the underlying geology, and connects Pennsylvania property owners with independent, DEP-certified testing and mitigation professionals serving Clearfield County.
Radon Risk in Clearfield County
The dominant subsurface formation across PA Radon Hub cities in Clearfield County is Appalachian Plateau / Pennsylvanian Sandstone-Shale Coal Measures. Radon is produced continuously in uranium-bearing bedrock, migrates through soil gas, and enters the built environment through foundation penetrations. Pennsylvania's combination of fractured bedrock, older housing stock, and pronounced stack effect during the heating season drives elevated indoor radon across most of the Commonwealth.
The EPA zone classification divides counties by predicted average indoor radon: Zone 1 predicts average indoor radon above 4.0 pCi/L, Zone 2 predicts 2.0–4.0 pCi/L, and Zone 3 predicts below 2.0 pCi/L. Zone classifications are population averages — individual home results can vary substantially. Clearfield County's Zone 1 classification means the county has high baseline radon potential, but every home should be tested individually.
Cities We Serve in Clearfield County
SB 760 Proposed School Testing Mandate in Clearfield County
Pennsylvania Senate Bill 760, if enacted as currently drafted, would require radon testing in every public school building constructed before 2014 that sits in an EPA Zone 1 county. Initial testing would be required to occur during the 2026–2027 academic year under ANSI-AARST MA-MFLB protocol, with mitigation required within six months of any confirmed result at or above 4.0 pCi/L. As of 2026 SB 760 remains in committee, so no testing mandate is currently in force. For Clearfield County school districts — which fall in Zone 1 — the proposed mandate would apply directly and, if enacted, would surface results across most pre-2014 buildings during the 2026–2027 window. For full compliance details, see the Pennsylvania Radon Compliance 2026 guide.
Request Radon Information for Clearfield County
Submit your request and we will connect you with a DEP-certified professional serving Clearfield County. All providers verified against the PA Department of Environmental Protection Bureau of Radiation Protection directory.
For detailed pricing by foundation type across Pennsylvania, see the Pennsylvania Radon Mitigation Cost Guide.
Verify DEP certification status before hiring — search the PA DEP certified contractor directory.
PA Radon Hub is an independent informational resource. We do not perform radon testing or mitigation. We connect Pennsylvania property owners with independent, DEP-certified professionals — verify any contractor's certification at dep.pa.gov/radon before hiring.
Measured Radon Levels in Clearfield County
- Basement
- 7.03pCi/L
- based on 802 tests
- First Floor
- 6.26pCi/L
- based on 97 tests
PA DEP RadonZip Tool, January 1990 – December 2025 · Last updated 2026-05-20
Frequently Asked Questions
Clearfield County is classified as Zone 1 — high radon potential — based on EPA radon zone mapping. 30.2% of tested homes across PA Radon Hub cities in this county exceed the 4.0 pCi/L action level.
The dominant subsurface formation referenced across PA Radon Hub cities in Clearfield County is Appalachian Plateau / Pennsylvanian Sandstone-Shale Coal Measures. Radon is produced by the decay of radium-226 in uranium-bearing bedrock and migrates into buildings through soil gas pathways — cracks, utility penetrations, and sump pits in the foundation.
Potentially, if Clearfield County schools fall in EPA Zone 1 and were built before 2014. Pennsylvania Senate Bill 760, if enacted as currently drafted, would require public school buildings meeting those criteria to complete radon testing during the 2026–2027 academic year, with mitigation required within six months of any confirmed result at or above 4.0 pCi/L. As of 2026 SB 760 remains in committee, so no testing mandate is currently in force.