Radon: We Track That!

Row of houses

CDC’s Tracking Network connects people with vital information on a variety of health and environmental topics. You can use data and information collected about radon to help determine individual and community risk for radon and inform community interventions.

Reduce Your Risk for Radon Exposure

In the United States, radon is the #2 cause of lung cancer after smoking and is estimated to cause over 20,000 deaths each year, according the U.S. Environmental Protection Agency.

Radon is a naturally occurring gas in rocks, soil, and groundwater that you cannot see, smell, or taste.

You can be exposed to radon primarily from breathing in radon that has comes in through cracks and gaps in buildings and homes.

Any home can have a radon problem. Testing is the only way to know if radon levels are high in your home. If radon levels in your home are above 4 picocuries per liter (pCi/L), the EPA recommends taking action pdf icon[413 KB]external icon to reduce your exposure.

Radon: We Track That

CDC’s Environmental Public Health Tracking Network has radon testing data at the state and county level for most of the continental United States. Users can explore the number of buildings tested, number and percent of pre-mitigation tests by radon level, number and percent of post-mitigation tests by radon level, median pre-mitigation test levels of radon, and maximum pre-mitigation levels of radon. Radon testing data on the Tracking Network come from some Tracking Program-funded states and several national radon testing laboratories.

Explore radon testing data on the Tracking Network’s Data Explorer and create custom maps, charts, and tables.

Example map

Example of a custom map showing county-level radon test results from labs.

Using Radon Data to Protect Communities

It’s not enough to just have data. Tracking programs have developed tools, applications, and products that go beyond data and help improve the health of communities. Here are a few examples:

  • New Hampshire Tracking increased radon testing through a radon testing media campaign.
  • Oregon Tracking created detailed radon hazard maps that increased radon testing.
  • See how the Washington Tracking Program’s improved radon exposure risk maps help keep residents safe in this Tracking in Action video.

For more information about the risks of radon, and the importance of getting your home tested for radon, visit CDC’s Radon Website.

Page last reviewed: July 15, 2019