Is Erie County, PA a radon risk area?

Erie County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. That puts Erie County in the 63rd percentile nationally for radon potential — higher than 63% of the counties EPA has rated.

Where Erie County sits nationally

About 267,750 people live in Erie County, Pennsylvania, spread over 798.904 square miles. That works out to roughly 335 people per square mile. Rank 88 by population within its EPA zone puts Erie County at the 92nd percentile among zone peers. Erie County falls in EPA Radon Region 3, one of 245 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Erie County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Erie County — testing is the only way to know an individual home's actual level.

Next steps for a home in Erie County

Nothing about Erie County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Pennsylvania's state radon program

Erie County's test kit answers today; a Airthings radon monitor keeps answering for Erie County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Erie County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.