Troy Baughman
(814) 771-7737✓ Verified October 4, 2026 on the official state list dated October 1, 2026, double-checked against a second state list.
Radon in ZIP code 15865
Last updated
ZIP 15865 crosses 2 county lines. Most of its land (78.7%) is in Jefferson County, Pennsylvania. EPA’s radon zone for this area: Zone 1, highest potential.
Zone 2 Jefferson County, PA · 78.7% of the ZIP’s land area
Predicted average indoor screening level from 2 to 4 pCi/L.
Zone 1 Clearfield County, PA · 21.3% of the ZIP’s land area
Predicted average indoor screening level above 4 pCi/L.
What this means for homes in 15865
EPA built its zone map county by county in 1993, so every address in each part of 15865 shares its county’s prediction. The zone is a starting point, not a measurement of your house. Zone 1 areas like this one have a high share of homes above 4 pCi/L, so testing is a priority.
Because 15865 crosses county lines, your county depends on your street. Your property tax bill or county assessor site shows which county you are in. Next: read how to test your home, then check the number with the level calculator.
Radon professionals for 15865
These professionals are listed for the counties that 15865 falls in. Featured listings are paid placements and are labelled.
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Nearby ZIP codes in Jefferson County
Pennsylvania radon help
PA Dept. of Environmental Protection, Bureau of Radiation Protection (717-783-3594) can help with test kits, local data and credentialed professionals: www.dep.pa.gov/Business/RadiationProtection/RadonDivision/Pages/Radon-in-the-home.aspx.
Frequently asked questions
What is the radon zone for ZIP code 15865?
ZIP 15865 spans 2 counties. The highest-potential zone among them is Zone 1 (highest potential). Jefferson County: Zone 2 (78.7% of the ZIP's land); Clearfield County: Zone 1 (21.3% of the ZIP's land).
Should I test for radon in 15865?
Yes. EPA recommends testing every home regardless of zone, because radon varies from house to house. Fix the home if a confirmed result is 4 pCi/L or higher, and consider fixing between 2 and 4 pCi/L.
Are there certified radon professionals near 15865?
This page lists 1 professional for the counties that 15865 falls in, each checked against the state's official certification or licence list.
Free checklist · PDF
Radon Test Checklist
A one-page, step-by-step checklist for running a home radon test right the first time, and what to do with the number.
- Short-term vs. long-term test: which to use
- Closed-house conditions and where to place the kit
- What 2, 4 and 8 pCi/L mean and when to fix
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