Listed for: Testing
Verified:Iowa state license
Locations and reports
EPA puts Johnson County, where Iowa City is, in Zone 1, its highest radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
The data
Iowa City, What is published
Radon data is published by county, not by city
Radon data is published by county, not by city. EPA assigns radon zones to counties, and CDC publishes radon test figures by county. Neither publishes a figure for Iowa City, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.
Johnson County has an EPA zone and its own CDC test figures, shown below. About 76,229 people live in Iowa City.
Iowa City, Counties
Each county's own EPA zone and its own published CDC figures for 2008 to 2017, laboratory, the newest period any of them has. A county without a figure for that period is shown without one, never with a figure from another year.
Johnson CountyZone 1Highest predicted potential
The median reported pre-mitigation result for 2008 to 2017, laboratory was 3.2 pCi/L in Johnson County.
CDC counts radon tests that were reported to it, not homes, and figures from few tests can swing widely from year to year. Each county’s report has its full history.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2008 to 2017, laboratory.
Radon Action Brief
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Local help
Iowa City, Professionals
Businesses whose listed city is Iowa City, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.
Radon professionals listed in Iowa City: 1 of 3
3 listings with Iowa City as the city. See radon testing in Iowa City, or all radon professionals in Iowa.
Iowa City, Local resources
Who to ask in Iowa: its radon program, test kits and professionals.
You can reach the Hotline by calling 1-800-383-5992 to order low-cost radon test kits and find answers to your radon questions.
Iowa’s radon program approves applications for persons who wish to become certified to perform radon testing or credentialed to perform mitigation and laboratories that provide radon testing devices and analytical services.
However, per Iowa Code chapters 543B.9 and 543B.18 and Iowa Administrative Code 193E Chapter 14 administered by the Iowa Real Estate Commission, a seller must disclose any known tests for the presence of radon and if yes, provide the date of last report and the result(s).
What it means
Iowa City, Questions
EPA's Map of Radon Zones classifies counties, not cities. Johnson County is in Zone 1 (highest predicted potential). A zone is a prediction for a whole county and never tells you the level in one home.
For 2008 to 2017, laboratory, the share of radon tests reported to CDC that were at or above 4 pCi/L was 41.6% in Johnson County (7,321 tests). Each is that county's own figure, counting tests reported to CDC, not homes. Radon411 does not average or combine them into a figure for the city.
Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.
The answers use the published figures of Johnson County, the county Iowa City lies in.
Explore
Iowa City, Next steps
What to do next: 1 of 4