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Radon in Rockford, Illinois

Rockford, Illinois spans 2 counties, Ogle County and Winnebago County. Radon data is published by county, so this page sets their figures side by side.

IllinoisAbout 147,384 people

What this means for you

  • Your area: Rockford lies in 2 counties. EPA rates Ogle County Zone 1 and Winnebago County Zone 1, where Zone 1 is the highest of its three radon zones. Zones are predictions for whole counties, and homes with elevated levels occur in all three zones.
  • Local tests: For 2017, the share of radon tests reported to CDC that were at or above 4 pCi/L was 52.4% in Ogle County (636 tests) and 34.9% in Winnebago County (2,703 tests). EPA's action level is 4 pCi/L.
  • 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.

Rockford, What is published

What is published for Rockford

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 Rockford, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.

Each county has its own CDC test figures, shown below side by side. About 147,384 people live in Rockford.

Rockford, Counties

Rockford's counties, side by side

Measured

Each county's own EPA zone and its own published CDC figures for 2017, 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.

  • Ogle County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    52.4%
    Median result
    4.1 pCi/L
    Tests reported
    636 tests
    Annual years on file
    4
  • Winnebago County
    EPA zone
    Zone 1: Highest predicted potential
    At or above 4 pCi/L
    34.9%
    Median result
    2.9 pCi/L
    Tests reported
    2,703 tests
    Annual years on file
    4
The counties Rockford lies in, each with its own EPA zone and its own published CDC figures for 2017
CountyEPA zoneReported tests at or above 4 pCi/LMedian reported resultTests reportedAnnual years on file
Ogle CountyZone 1: Highest predicted potential52.4%4.1 pCi/L636 tests4
Winnebago CountyZone 1: Highest predicted potential34.9%2.9 pCi/L2,703 tests4

The median reported pre-mitigation result for 2017 was 4.1 pCi/L in Ogle County and 2.9 pCi/L in Winnebago 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, 2017.

Rockford, Professionals

Radon professionals listed in Rockford

Businesses whose listed city is Rockford, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.

7 listings with Rockford as the city. See every listing in Rockford, or all radon professionals in Illinois.

Rockford, Local resources

Local resources for Rockford

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

IEMA-OHS Radon Program

Illinois Emergency Management Agency and Office of Homeland Security

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

Phone
(800) 325-1245
Licensing of radon professionals
The Agency also licenses and regulates the individuals who provide radon measurement and mitigation to the public.
Disclosure when a home is sold or rented
Illinois Radon Awareness Act - This is the legislation that requires the seller to provide to the buyer of any interest in residential real property the IEMA-OHS pamphlet entitled "Radon Testing Guidelines for Real Estate Transactions" and the Illinois Disclosure of Information on Radon Hazards.
Visit the program's page(opens in a new tab)

Test kits

Ask the program whether it has free or discounted kits, or compare kits you can buy.

Free and low-cost kitsCompare kits

Radon professionals

7 listings cover Rockford.

Professionals in Illinois

Rockford, Questions

Questions about radon in Rockford

What radon zone is Rockford in?

EPA's Map of Radon Zones classifies counties, not cities. Ogle County and Winnebago County are 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 Rockford's counties?

For 2017, the share of radon tests reported to CDC that were at or above 4 pCi/L was 52.4% in Ogle County (636 tests) and 34.9% in Winnebago County (2,703 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 Rockford?

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 Ogle County and Winnebago County, the counties Rockford lies in.

Rockford, Keep reading

Keep reading

Rockford / Next steps

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