Do it yourself radon test kitWhat radon data are available on the portal?

The data portal contains measures related to households that have tested their home for radon in air. These data are from more than 57,000 radon test results, primarily from 2013 through mid-2019, and can be summarized at the town, county, and state level.

Measures include:

  • Number of households tested for radon in air
  • Percent of households tested with radon in air < 2 pCi/L 
  • Percent of households tested with radon in air >=2 pCi/L
  • Percent of households tested with radon in air >=4 pCi/L
  • Median value for radon in air
  • 95th percentile value for radon in air
  • Maximum value for radon in air

You can also find household survey data from the Maine Behavioral Risk Factor Surveillance System. Data are available for single and combine years from 2009-2016 at the county level.

Measures include:

  • Radon in air testing 
  • Radon levels above normal among homes tested
  • Radon levels reduced among homes with radon levels above normal

Why track radon in air?

Radon is the second leading cause of lung cancer overall, and the leading cause among non-smokers. Many households in Maine have unsafe levels of radon. Homeowners and property owners are responsible for testing their homes for radon and installing mitigation systems, if necessary. The radon data on the Maine Tracking Network can help form a better understanding of what parts of the state may be at higher risk for radon in air, as well as areas where testing rates are low. Test result data, combined with survey data, helps communities encourage homeowners and property owners to test their homes for radon.

Go to the Data Portal ››

Where can I find more information about radon in air?