27%tests ≥ 4 pCi/L
1,316tests on record
2.2median pCi/L
Zone 2EPA zone (1993 prediction)

Test results in Tolland County

ResultShareEPA guidance
Below 2 pCi/L46%Below EPA's levels
2 to 4 pCi/L27%Consider fixing
4 pCi/L or more27%EPA recommends fixing

What the data shows

How Tolland County compares

Tolland County ranks 4 of 6 among its neighboursShare of tests at or above 4 pCi/L · Radon test results from laboratories, 2008–2017 · whisker: 95% range
Windham County34%Worcester County, Massach…34%New London County28%Tolland County27%Hartford County21%Hampden County, Massachus…13%Connecticut 26%
Data table
AreaTests ≥ 4 pCi/LTests
Windham County34%1,340
Worcester County, Massachusetts34%46,440
New London County28%2,081
Tolland County27%1,316
Hartford County21%4,918
Hampden County, Massachusetts13%3,452
Connecticut (8 counties)26%25,572

Same source as Tolland County.

What it means for your home

About 1 in 4 results in Tolland 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: 1,316. 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