About Radon Data


Our radon data came from a contract between the Tennessee Department of Environment and Conservation and Air Check, a private testing laboratory. Many of the test results were performed using free radon test kits offered by TDEC through their cooperative agreement with the U.S. Environmental Protection Agency. Some of data represent tests performed privately by individuals or radon professionals.

The data are shown as radon test results aggregated by zip code. All testing was done voluntarily, not at random.

Radon data include:

  • Measurement results in picocuries of radon per liter of air (pCi/L)
  • State, county and zip code
  • Year

Limitations inherent with our radon data:

  • Data do not represent a random sample
  • Data do not show variability from seasonality, if present
  • Data are not inclusive of all zip codes
  • Data may not represent many tests within a particular zip code
  • Data were cleaned for duplicates, although some duplicates will persist