Radon Testing

At a glance

Tracking radon data in a standard way over time can help us identify areas that need more testing. This helps to provide a more accurate estimate of radon exposure in an area.

Aerial view of residential neighborhood at sunrise

We Track That

The Tracking Network has radon testing data at the state and county level for most of the continental United States. The data on the Tracking Network come from some Tracking Program-funded states and several national radon testing laboratories.

Test Your Home for Radon‎

Every home should be tested for radon so the individuals living there can see if their home has elevated radon levels and take steps to reduce it, if needed.
Testing for Radon in Your Home

Types of Data

This indicator provides radon testing data from labs at the state and county level for most of the continental United States. National radon testing laboratories provide these data to the Tracking Network. Data available include the following.

  • Number of buildings tested
  • Number and percent of pre-mitigationA tests by radon level
  • Median pre-mitigationA radon levels in tested buildings
  • Maximum pre-mitigationA radon levels in tested buildings

This indicator provides radon testing data at the state and county level for some Tracking Program-funded states. Individual states provide these data to the Tracking Network. Available data include the following.

  • Number of buildings tested
  • Number and percent of pre-mitigationA tests by radon level
  • Number and percent of post-mitigation tests by radon level
  • Median pre-mitigationA test levels of radon
  • Maximum pre-mitigationA levels of radon

Access the Data

Use the Data Explorer to create custom maps, tables, and charts.

View data in simple Quick Reports.

Get machine-readable data through the Application Program Interface (API).

Data in Action

Analyzing, collecting, and disseminating radon testing information is the first step to developing policies and educational resources that can help prevent the harmful health effects related to elevated radon exposures. For example, tracking radon data in a standard way over time can help us identify areas with low testing that might have high levels of radon. These data can inform planning and implementation of public health actions for areas with the greatest need.

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Content Source:
National Center for Environmental Health
  1. All pre-mitigation data include those test results not designated as pre- or post-mitigation.