48%tests ≥ 4 pCi/L
81tests on record
3.8median pCi/L
Zone 1EPA zone (1993 prediction)

Test results in Wells County

ResultShareEPA guidance
Below 2 pCi/L17%Below EPA's levels
2 to 4 pCi/L35%Consider fixing
4 pCi/L or more48%EPA recommends fixing

What the data shows

Where Wells County sits among North Dakota's 53 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%20%40%60%80%100%

How Wells County compares

Wells County ranks 7 of 8 among its neighboursShare of tests at or above 4 pCi/L · Radon test results from laboratories, 2008–2017 · whisker: 95% range
Kidder County79%Benson County77%Stutsman County74%Foster County61%Sheridan County55%Pierce County49%Wells County48%Eddy County13%North Dakota 59%
Data table
AreaTests ≥ 4 pCi/LTests
Kidder County79%29
Benson County77%31
Stutsman County74%351
Foster County61%31
Sheridan County55%11
Pierce County49%39
Wells County48%81
Eddy County13%8
North Dakota (53 counties)59%6,607

Same source as Wells County.

What it means for your home

About 1 in 2 results in Wells 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: 81. 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