Skip to content

Locations and reports

Radon in Rockford, Illinois

Rockford lies in 2 counties, in EPA Zone 1. Homes with elevated levels occur in all three zones, so the only way to know your home's level is to test it.

Data checked By Radon411Methodology

Predicted
Zone 1Highest predicted potential
Measured
By countyEach county's own CDC figures are set side by side below.
Your home
Test to knowNo area figure here is a reading of your home.

The data

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.

Radon Action Brief

National Radon Action MonthPre-sale

The radon brief for Rockford, in one dated file.

  • Your area's radon record, explained.
  • Your plan to test this week.
  • Fix costs and pros near you.

Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25

Get the Rockford BriefSee a free sample

Area data, not a test of the building.

Local help

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 radon mitigation and testing in Rockford, or all radon professionals in Illinois.

Rockford, Local resources

Local resources for Rockford

Who to ask in Illinois: its radon program, test kits and professionals.

What Illinois's program says
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.

What it means

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.