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

Publications about Radon

On This Page:


General Radon Information

First page of Basic Radon Facts Document

Featured Publication: Download this revised customizable fact sheet!

There is no known safe level of exposure to radon. EPA strongly recommends that you fix your home if your test shows 4 picocuries (pCi/L) or more. If your test shows between 2 and 4 pCi/L, consider fixing.

 The Guide to Protecting Yourself and Your Family from Radon

A Citizen's Guide to Radon: The Guide to Protecting Yourself and Your Family from Radon (EPA 402/K-12/002, December 2016)
This guidance offers strategies for testing your home for radon and discussions of what steps to take after you have tested, discussions of the risk of radon and radon myths. (Note: The current version reflects corrections to links and contact information.)

 How to Fix Your Home

Consumer's Guide to Radon Reduction: How to Fix Your Home (EPA 402/K-10/005, December 2016)
You have tested your home for radon, but now what? This guidance has been specifically designed for people who have tested their home for radon and confirmed that they have elevated radon levels — 4 picocuries per liter (pCi/L) or higher. Know what to look for when selecting a qualified contractor to reduce the radon levels in your home, determine an appropriate radon reduction method and maintain your radon reduction system.

Home Buyer's and Seller's Guide to Radon

Home Buyer's and Seller's Guide to Radon (EPA 402/K-13/002, March 2018)
This booklet is intended for anyone who is buying or selling a home, real estate and relocation professionals, home inspectors and others.

Top of Page

Learning About Radon A Part Of Nature

Learning About Radon A Part Of Nature
Written for Native Americans, this 18-page booklet discusses radon's place in the world, the basics on testing, and how homes can be fixed to reduce radon levels. Native Americans should contact their Tribal health department or state radon program office for more information.

See also EPA's Indoor Air Quality Tribal website.

EPA Map of Radon Zones

EPA Map of Radon Zones
The purpose of this map is to assist National, State and local organizations to target their resources and to implement radon-resistant building codes. This map is not intended to be used to determine if a home in a given zone should be tested for radon. Homes with elevated levels of radon have been found in all three zones. All homes should be tested regardless of geographic location.

Read more about the EPA Map of Radon Zones and find radon state contact information.

Local Efforts to Reduce Exposure to Radon

Local Efforts to Reduce Exposure to Radon
Every day in the United States someone is exposed to radon gas in their home. EPA and its partners are working to inform and educate citizens of the dangers associated with exposure to radon gas. Read about some outstanding examples and lessons learned of the successes achieved.

Top of Page


Radon Causes Lung Cancer: the Scientific Proof

Technical Support Document for the 1992 Citizen's Guide to Radon

Technical Support Document for the 1992 Citizen's Guide to Radon
This document presents the wide range of technical analyses, radon risk communication research, legislative directives and other information that the U.S. EPA used to shape the policies that are set forth in the 1992 "A Citizen's Guide to Radon." The document summarizes extensive technical analyses of the data that have been gathered over the past years.

A Guide for Health Care Providers - Reducing the Risk From Radon: Information and Interventions Exit
The Conference of Radiation Control Program Directors, Inc., has developed a new guide for health care providers designed to furnish health care providers with the information they need to reduce their patients' exposures to radon. 

Biological Effects of Ionizing Radiation (BEIR) VI Report: "The Health Effects of Exposure to Indoor Radon

2003 Report: EPA's Assessment of Risks from Radon in Homes

EPA updated the Agency’s estimates of lung cancer risks from indoor radon based on the National Academy of Sciences’ (NAS) latest report on radon, the Biological Effects of Ionizing Radiation (BEIR) VI Report (1999). This report is the most comprehensive review of scientific data gathered on radon and builds on and updates the findings of the previous NAS BEIR IV Report (1988). NAS concluded that the findings of BEIR VI showed that if homeowners haven’t yet tested their homes for radon and fixed them if the levels are elevated, they should do so.

National Cancer Institute's 2010 Surveillance, Epidemiology, and End Results (SEER) estimated US mortality numbers (PDF) (1 pp, 15 K). Exit

Top of Page


Testing and Fixing Schools

Managing Radon in Schools

Managing Radon in Schools, June 2010
As part of an effective IAQ management program, schools should test for radon to know if radon levels are elevated — and if so, reduce risks to occupants through radon mitigation. Many schools have successfully applied radon mitigation strategies to control indoor radon levels.

Radon Prevention in the Design and Construction of Schools and Other Large Buildings

Radon Prevention in the Design and Construction of Schools and Other Large Buildings (TXT)(EPA 625-R-92-016, June 1994)
It is typically easier and much less expensive to design and construct a new building with radon-resistant and/or easy-to-mitigate features, than to add these features after the building is completed and occupied.

EPA no longer updates the follow information, but it may be useful as a reference or resource.

 A Team Approach

Reducing Radon in Schools: A Team Approach (TXT)(EPA 402-R-94-008, April 1994)
This document will assist you in determining the best way to reduce elevated radon levels found in a school. It is designed to guide you through the process of confirming a radon problem, selecting the best mitigation strategy, and directing the efforts of a multidisciplinary team assembled to address elevated radon levels in a way that will contribute to the improvement of the overall indoor air quality of the school.

Radon Mitigation Standards for Schools and Large Buildings

Radon Mitigation Standards for Schools and Large Buildings (RMS-LB 2014) from The American National Standards Institute (ANSI) and American Association of Radon Scientists and Technologists (AARST)
This new American National Standard addresses the complexities of properly mitigating radon in large and complicated building structures that require specialized techniques and quality assurance to address complicated building designs and specialized airflow.

Copies of RMS-LB 2014 may be purchased from AARST book store Exit, or from the American National Standards Institute store Exit.

Top of Page

I want you to test for radon
National Radon Action Month Poster Contest 2016 Winner

National Radon Poster Contest

Congratulations to the winner of National Radon Poster Contest!


How to Order EPA Publications

EPA's National Service Center for Environmental Publications (NSCEP)
Phone: 1-800-490-9198 (M-F from 11:00 am-3:00pm eastern)
Fax: 301-604-3408
Email: NSCEP (nscep@lmsolas.com)

Use the EPA Document Number when ordering from NSCEP. Some documents are only available as PDFs.

Top of Page


Contractor Reports

 Radon Device Performance Check (July 2014)

Contractor Report: Radon Device Performance Check (July 2014)
This report provides a review of radon measurement proficiency data EPA used to help determine the current proficiency of radon test devices. This report, and its release, is one thing the radon technical community is doing to help assure the public that radon test devices can be used to make mitigation decisions. Also, this report helps EPA respond to the Office of the Inspector General's report (Rpt. No. 09-P-0151), regarding oversight of radon testing device accuracy and reliability. Author: Richard Krop, Ph.D., Angana Roy, MPH.

Contractor Report: Exploratory Study of Basement Moisture During Operation of ASD Radon Control Systems (Revised March 2008)
EPA's Indoor Environments Division commissioned an Exploratory Study of Basement Moisture During Operation of ASD Radon Control Systems, under a cooperative agreement with Auburn University, Auburn, Alabama. The principal investigator was Brad Turk of Environmental Building Sciences, Inc., Las Vegas, New Mexico.

The purpose of the study was to better understand the potential moisture reduction benefits from the operation of residential radon control systems. The report contains information of interest to a wide variety of audiences. Therefore, EPA is making this contractor's reports publicly available. Because these are contractor's reports, their findings, conclusions and recommendations are those of its authors, not necessarily those of EPA. The Agency believes that this information may be useful to industry associations, standard-setting organizations, government agencies and consumers.

Top of Page