Radon in Illinois

Interactive Map of Illinois Radon Zones

The Illinois Emergency Management Agency (IEMA) publishes an interactive state map to indicate the potential radon levels in each county. The data presented is taken from annual reports submitted by licensed measurement and mitigation professionals. The measurement data includes calendar years 2003 – 2011. The mitigation data includes calendar years 2005 – 2011. The measurement data includes only the highest measurement for each address that was submitted.

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.

Using the Interactive map. The interactive map uses the Adobe Flash. If you would prefer a text-based method of viewing the measurement, mitigation and licensed professional data click here. Clicking on the map of Illinois will open an interactive map of the state that displays average measured radon levels submitted to IEMA, color-coded by county. The map enables you to zoom in and out and to find average measured radon levels by county and zip code. Clicking on a county will bring up additional options for locating measurement and mitigation professionals as well as providing access to the mmeasurement data for a specific county by zip code.

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