An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Radon

State Maps of Radon Zones

The purpose of these maps are to assist National, State and local organizations to target their resources and to implement radon-resistant building codes.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.