22%tests ≥ 4 pCi/L
802tests on record
1.6median pCi/L
Zone 2EPA zone (1993 prediction)

Test results in Franklin County

ResultShareEPA guidance
Below 2 pCi/L56%Below EPA's levels
2 to 4 pCi/L21%Consider fixing
4 pCi/L or more22%EPA recommends fixing

What the data shows

Where Franklin County sits among Massachusetts's 14 counties with dataEach dot is a county's share of tests at or above 4 pCi/L · Radon test results from laboratories, 2008–2017
0%10%20%30%40%

How Franklin County compares

Franklin County ranks 4 of 7 among its neighboursShare of tests at or above 4 pCi/L · Radon test results from laboratories, 2008–2017 · whisker: 95% range
Worcester County34%Berkshire County27%Bennington County, Vermont26%Franklin County22%Cheshire County, New Hamp…20%Hampshire County19%Windham County, Vermont18%Massachusetts 24%
Data table

Same source as Franklin County.

What it means for your home

About 1 in 4 results in Franklin 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.

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Fixing high radon

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

About this data

Source: Radon test results from laboratories (CDC Environmental Public Health Tracking Network). Period: 2008–2017. Tests: 802. 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