75%tests ≥ 4 pCi/L
914tests on record
7.6median pCi/L
Zone 1EPA zone (1993 prediction)

Test results in Seward County

ResultShareEPA guidance
Below 2 pCi/L12%Below EPA's levels
2 to 4 pCi/L13%Consider fixing
4 pCi/L or more75%EPA recommends fixing

What the data shows

Where Seward County sits among Nebraska's 93 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%

How Seward County compares

Seward County ranks 5 of 7 among its neighboursShare of tests at or above 4 pCi/L · Radon test results from laboratories, 2008–2017 · whisker: 95% range
York County80%Butler County79%Polk County77%Fillmore County77%Seward County75%Saline County69%Lancaster County58%Nebraska 59%
Data table
AreaTests ≥ 4 pCi/LTests
York County80%616
Butler County79%483
Polk County77%188
Fillmore County77%175
Seward County75%914
Saline County69%242
Lancaster County58%4,954
Nebraska (93 counties)59%42,782

Same source as Seward County.

What it means for your home

More than half of all results in Seward 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: 914. 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