Quick Answer

Radon levels in Centre County, Pennsylvania are high based on EPA Zone 1. 5 cities have documented radon testing data through PA Radon Hub. The EPA action level of 4 pCi/L is exceeded in approximately 59.1% of tested homes in this region.

Radon in Centre County, Pennsylvania

Centre 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 homeowners with DEP-certified testing and mitigation professionals serving Centre County.

Radon Risk in Centre County

The dominant subsurface formation across PA Radon Hub cities in Centre County is Ordovician Limestone/Dolomite (Karst). 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. Centre County's Zone 1 classification means the county has high baseline radon potential, but every home should be tested individually.

Cities We Serve in Centre County

Bellefonte, PA →
Zone 1 · 5.4 pCi/L avg · 64.2% exceedance
Extreme radon risk. Bellefonte sits at the convergence of Ordovician limestone and dolomite karst formations that define Centre County's Zone 1 classification. Spring Creek valley geology accelerates radon migration into foundations.
Centre Hall, PA →
Zone 1 · 6.5 pCi/L avg · 62.4% exceedance
High radon risk from Ordovician limestone and dolomite underlying Penns Valley. Centre Hall sits in the heart of Penns Valley — a synclinal trough floored by carbonate bedrock with extensive karst development including sinkholes, caves, and solution channels. This is the same Great Valley carbonate sequence that produces extreme radon across Centre, Cumberland, and Lancaster counties. Penn's Cave, located nearby, demonstrates the scale of karst dissolution in this formation.
Philipsburg, PA →
Zone 1 · 4.5 pCi/L avg · 52.3% exceedance
High radon risk from the Centre County Ordovician limestone-dolomite formation transitioning into Appalachian Plateau shale. Philipsburg's position at this geological boundary produces elevated radon concentrations consistent with Centre County's Zone 1 classification.
Snow Shoe, PA →
Zone 1 · 4.8 pCi/L avg · 48.3% exceedance
High radon risk from Pennsylvanian sandstone and shale on the Appalachian Plateau above the Bald Eagle Valley. Snow Shoe sits on the Moshannon Creek drainage where the plateau surface is underlain by Pennsylvanian coal measures transitioning to older Mississippian and Devonian formations at the valley edge. This geological transition zone — where plateau sandstone meets valley carbonate — creates variable but frequently elevated radon conditions.
State College, PA →
Zone 1 · 5.7 pCi/L avg · 68.5% exceedance
HIGHEST radon potential in PA. Karst limestone bedrock with high radium content creates elevated indoor radon.

Radon and Home Sales in Centre County

Radon disclosure expectations and pre-sale testing practices vary across Pennsylvania, but Centre County buyers and lenders increasingly request results during the inspection contingency period. Sellers often mitigate ahead of listing to avoid renegotiation when post-inspection results return high.

For a county-by-county breakdown of disclosure norms, mortgage requirements, and buyer/seller obligations, see the Radon and Home Sales in Pennsylvania guide.

SB 760 School Testing Mandate in Centre County

Pennsylvania Senate Bill 760 requires radon testing in every public school building constructed before 2014 that sits in an EPA Zone 1 county. Initial testing must be completed 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. For Centre County school districts — which fall in Zone 1 — the mandate applies directly and will surface results across most pre-2014 buildings during the 2026–2027 window. For full compliance details, see the Pennsylvania Radon Compliance 2026 guide.

Find a DEP-Certified Radon Contractor in Centre County

PA Radon Hub connects Centre County homeowners with independent DEP-certified radon testing and mitigation professionals. All contractors 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.

County: Centre County

By submitting, you agree to receive calls/texts from DEP-certified pros. Message/data rates may apply.

PA Radon Hub is an independent informational resource and is not a radon service provider. Verify contractor certification at dep.pa.gov before hiring.

PA Radon Hub is an independent informational resource. We do not perform radon testing or mitigation. We connect homeowners with DEP-certified professionals — verify any contractor's certification at dep.pa.gov/radon before hiring.

Frequently Asked Questions

What EPA radon zone is Centre County in?

Centre County is classified as Zone 1 — high radon potential — based on EPA radon zone mapping. 59.1% of tested homes across PA Radon Hub cities in this county exceed the 4.0 pCi/L action level.

What geological formations drive radon risk in Centre County?

The dominant subsurface formation referenced across PA Radon Hub cities in Centre County is Ordovician Limestone/Dolomite (Karst). 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.

Does SB 760 apply to public schools in Centre County?

Yes if Centre County schools fall in EPA Zone 1 and were built before 2014. Pennsylvania Senate Bill 760 requires public school buildings meeting those criteria to complete radon testing in the 2026–2027 academic year, with mitigation required within six months of any confirmed result at or above 4.0 pCi/L.