Skip to main content

Multi-Hazard Winter Event Expected Throughout Illinois

A severe multi-hazard winter event is expected to impact the state through the weekend, bringing life-threatening cold to Northern and Central Illinois and heavy snowfall to Southern Illinois. [Read the full press release here] for a detailed breakdown of regional impacts and official safety guidance, and visit [Ready.Illinois.gov] for essential winter preparedness tips and to locate a warming center near you.

Radon in Illinois

Interactive Radon Map by County or Zip Code

View Map

Disclaimer and Purpose. This map is NOT intended to be used to determine if a home in a given county or zip code should be tested for radon. Homes with elevated levels of radon have been found throughout the state of Illinois. ALL Homes Should Be Tested regardless of geographic location.

The data presented is taken from annual reports submitted by licensed measurement and mitigation professionals. The measurement data includes calendar years 2003 - 2019. The mitigation data includes calendar years 2005 - 2011. The measurement data includes only the highest measurement for each address that was submitted. Data collected from measurements performed by homeowners will be included in future updates of the website.

Measurements can be found by either County or Zip Code.

Looking for a measurement or mitigation professional? View our list of licensed professionals. 

View Professionals