43%tests ≥ 4 pCi/L
6,429tests on record
3.1median pCi/L
Zone 1EPA zone (1993 prediction)

Test results in Bradford County

ResultShareEPA guidance
Below 2 pCi/L36%Below EPA's levels
2 to 4 pCi/L22%Consider fixing
4 pCi/L or more43%EPA recommends fixing

What the data shows

Where Bradford County sits among Pennsylvania's 67 counties with dataEach dot is a county's share of tests at or above 4 pCi/L · Pennsylvania county radon test results, 1989–2026
0%20%40%60%

How Bradford County compares

Bradford County has the highest share of high results among its neighboursShare of tests at or above 4 pCi/L · Pennsylvania county radon test results, 1989–2026 · whisker: 95% range
Bradford County43%Lycoming County42%Wyoming County39%Susquehanna County35%Tioga County34%Sullivan County34%Pennsylvania 34%
Data table
AreaTests ≥ 4 pCi/LTests
Bradford County43%6,429
Lycoming County42%19,016
Wyoming County39%4,758
Susquehanna County35%4,779
Tioga County34%4,550
Sullivan County34%828
Pennsylvania (67 counties)34%3,356,893

Same source as Bradford County. Other bordering counties: Chemung County, New York, Tioga County, New York.

What it means for your home

About 1 in 2 results in Bradford County were at or above 4 pCi/L, where the EPA recommends a fix. Only a test shows your own home's level.

Levels in pCi/L from the EPA. The WHO reference level is 100 Bq/m³, about 2.7 pCi/L.

Test your home

Start with a short-term test (2–90 days) and confirm a result of 4 pCi/L or more with a second test. EPA guide

Sponsored: we earn a commission on purchases through these links. We haven't tested Airthings monitors yet.

Prefer a digital monitor? See Airthings radon monitors, or enter code radonbycounty-10OFF at their discount store for 10% off.

Fixing high radon

No local job records yet. National range: $800–$2,500, average $1,200 (EPA, 2003). Cost guide →

Pennsylvania licenses radon mitigators. Source

Buying or selling here

Pennsylvania's required Seller's Property Disclosure Statement asks whether the seller knows of hazardous substances on the property, including radon (49 Pa. Code § 35.335a). Source

Checked against the official text on 2026-11-03. Not legal advice.

About this data

Source: Pennsylvania county radon test results (Pennsylvania Department of Environmental Protection). Period: 1989–2026. Tests: 6,429. Read the methodology →

These are voluntary and real-estate tests, not a random sample of homes, so they describe tested homes rather than every home.

About this page

Published by Ray Roman, editor of Radon by County. Figures are loaded from the cited source and spot-checked against it. Editorial policy · About us