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Radon in Iowa City, Iowa

Iowa City, Iowa lies in Johnson County, which EPA places in Zone 1, highest predicted potential. Radon data is published by county, so this page reads Johnson County's figures.

IowaAbout 76,229 people

What this means for you

  • Your area: EPA rates Johnson County, where Iowa City is, Zone 1, the highest of its three radon zones. That is a prediction for the whole county, and homes with elevated levels occur in all three zones.
  • Local tests: Of 7,321 radon tests reported to CDC for Johnson County (2008 to 2017, laboratory), 41.6% were at or above 4 pCi/L, EPA's action level.
  • Your home: The only way to know your home’s level is to test it.
How to testFind a certified tester

pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.

Iowa City, What is published

What is published for Iowa City

Information:

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

The county Iowa City lies in

Measured

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

41.6%
Reported tests at or above 4 pCi/L, 2008 to 2017, laboratory
3.2 pCi/L
Median reported result
7,321 tests
Tests reported to CDC
0
Annual years on file

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.

Iowa City, Professionals

Radon professionals listed in Iowa City

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.

5 listings with Iowa City as the city. See every listing in Iowa City, or all radon professionals in Iowa.

Iowa City, Local resources

Local resources for Iowa City

Who to ask in Iowa: the state's radon program, test kits and professionals.

Iowa HHS Radon Program

Iowa Department of Health and Human Services

Iowa’s radon program answers questions about testing, mitigation and the rules where you live.

Phone
(515) 281-4928
Licensing of radon professionals
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.
Disclosure when a home is sold or rented
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).
Visit the program's page(opens in a new tab)

Test kits

The program says: 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.

Free and low-cost kitsCompare kits

Radon professionals

5 listings cover Iowa City.

Professionals in Iowa

Iowa City, Questions

Questions about radon in Iowa City

What radon zone is Iowa City in?

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.

How many radon tests come back high in Iowa City's counties?

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.

Should I test my home in Iowa 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.

Iowa City, Keep reading

Keep reading

Iowa City / Next steps

What to do next