*NEW DATA NOW AVAILABLE!
* These estimates were prepared by Portland State University, Department of Geology. As we continue to analyze data and more people test their homes for radon, these resources will be updated.
Protect yourself and your family from radon
Several different measurement methods may be used to determine the radon concentrations in structures. Each method has its own advantages and disadvantages. Users must decide which method is best suited to their situation.
Visit EPA's website for additional information about National Radon Action Month.
Radon claims the lives of more than 20,000 people annually in the United States alone.
Hear from a survivor of radon-induced lung cancer to learn what you can do to protect yourself and your family.