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Radon

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Download this recently revised customizable fact sheet!
(PDF, 2 pp, 150 K) EPA 402/F-12/005, February 2013
Hoja de datos sobre el radón (PDF) (2 pp, 178 K) EPA 402/F-12/005, May 2013

Can I Get the Files to Print Radon Publications?

EPA is offering print-ready, PC format files of the English versions of A Citizen's Guide to Radon (EPA-402/C-12/001), the Home Buyer's and Seller's Guide to Radon (EPA 402/C-09/002) and the Consumer's Guide to Radon Reduction (EPA 402/C-10/002). These files can assist you in printing your own radon publications for special events or conferences. Each free CD is complete and press-ready, including images and fonts. Use the EPA Document Numbers above to request a CD from NSCEP.

Consumers and Homeowners: Testing and Fixing Your Home

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.

A Citizen's Guide to Radon

A Citizen's Guide to Radon: The Guide to Protecting Yourself and Your Family from Radon
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.)

HTML Version | PDF Version (16 pp, 618 K) | Get the files to print this publication | EPA 402/K-12/002, May 2012

Manual Informativo Sobre El Radón, La Guía para proteger a su familia y a usted del radón

Esta publicación para el sitio Web es la traducción al español de "A Citizen’s Guide to Radón". Este manual le ofrece información sobre los riesgos debido a la exposición al gas radón y aclara datos acerca de los mitos existentes sobre el mismo. También encontrará estrategias para hacer la prueba de radón en su hogar y los pasos a seguir después de hacer la misma.

PDF Versión (16 pp, 1.5 M)


Consumer's Guide to Radon Reduction

Consumer's Guide to Radon Reduction: How to Fix Your Home
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.

HTML Version | PDF Version (20 pp, 650 K) | Get the files to print this publication | EPA 402/K-10/005, September 2010

Home Buyer's and Seller's Guide to Radon

Home Buyer's and Seller's Guide to Radon
This booklet is intended for anyone who is buying or selling a home, real estate and relocation professionals, home inspectors and others.

HTML Version | PDF Version (44 pp, 4 M) | Get the files to print this publication | EPA 402/K-09/002, January 2009

Guía del Radon para el Comprador y Vendedor de Viviedas

Guía del Radon para el Comprador y Vendedor de Viviedas
Este folleto está dirigido a cualquier persona que esté comprando o vendiendo una casa, bienes raíces y profesionales de la reubicación, los inspectores de viviendas y otros.

HTML Versión | PDF Version (52 pp, 604 K) | EPA 402-K-02-001, julio de 2002


earning 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.

PDF Version (10 pp, 3.3 M) This document is only available on-line
See also www.epa.gov/iaqtribal


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


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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.

Get the document from NSCEP.

Radon - A Physician's Guide

Radon - A Physician's Guide: The Health Threat With A Simple Solution
This booklet on radon has been developed for physicians by the EPA in consultation with the American Medical Association (AMA). Its purpose is to enlist physicians in the national effort to inform the American public about the serious health risk posed by indoor radon gas.

HTML Version | EPA 402-K-93-008, September 1993


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Media Resources for Partners and Stakeholders

EPA’s media campaigns for TV, radio and print for use by our partners, stakeholders, collaborators and advocates. Learn more about how to view, listen to, and order radon Public Service Announcements at www.epa.gov/radon/media_campaigns.html.

Video: Breathing Easy: What Home Buyers and Sellers Should Know About Radon
The video is a visual educational tool on how to best include radon in residential real estate transactions. With a bit of light humor, the video covers the basics, including radon science, the lung cancer risk, home inspection, building a new home radon-resistant, testing and fixing a home, disclosure, state radon offices, hotline and web resources, and key radon numbers, e.g., EPA's action level and the U.S. indoor and outdoor averages. The primary audiences are home buyers and sellers, and real estate sales agents and brokers. Home inspectors, mortgage lenders, other real estate practitioners, and radon services providers will also find the video helpful.


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.

PDF Version (1 page, 405 K) | Read more about the EPA Map of Radon Zones | Find radon information and resources in your state

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.

PDF Version (12 pp, 352 K)


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Builders: Building New Homes with Radon-reducing Features

Including radon-reducing features in new homes is cost-effective, and in demand by health conscious homebuyers. Some builders are installing complete fan-powered systems, especially in high radon potential areas. EPA recommends the ASTM E1465-08 standard for radon-reducing features in new homes.

RRNC 2.0

ANSI-AARST Standard: Reducing Radon in New Construction of 1 & 2 Family Dwellings and Townhouses
ANSI/AARST has released "RRNC 2.0 Reducing Radon in New Construction of 1 & 2 Family Dwellings and Townhouses" to control for radon in the construction of new residential homes. The standard, designated CCAH-2013, is written in code language. Copies are available for $45 each for non-members, $30 each for AARST members from AARST at www.aarst.org/bookstore.shtml exiting EPA.


Building Radon Out

Building Radon Out: A Step-by-Step Guide on How to Build Radon-Resistant Homes
This 81-page, fully illustrated guide contains all the info you need in one place to educate home builders about radon-resistant new construction (RRNC), including: Basic questions and detailed answers about radon and RRNC; Specific planning steps before installing a system; Detailed installation instructions with helpful illustrations; Tips and tricks when installing a system, Marketing know-how when dealing with homebuyers; and, Architectural drawings.

PDF Version (84 pp, 5.5 M) | Get more information on Radon-resistant New Construction


Passive Radon Control System for New Construction

Passive Radon Control System for New Construction
These architectural drawings are intended for use by architects, home builders, designers, radon mitigators and other interested in the installation of passive radon control systems in one and two-family dwellings. Architectural drawings of: passive radon control system; crawlspace radon control system; and additional fan for active system are available.

522K zipped file for use with CAD programs | PDF Version (4 pp, 962 K) | EPA 402-95-012, May 1995

standard practices for radon control options in the design and construction of new low-rise residential buildings

To control for radon in new residential construction, see ASTM’s Standard Practice for Radon Control Options for the Design and Construction of New Low-Rise Residential Buildings*.
A single free printed copy of ASTM E 1465-08a is available from EPA upon request. Use EPA’s document number (402-K/10/006) when ordering from the National Service Center for Environmental Publications.

*ASTM E1465-08a; January, 2009. EPA reprints E1465-08a with permission from ASTM. Copies of E1465-08a may be purchased from ASTM International exiting EPA, or from the American National Standards Institute exiting EPA.


Model Standards and Techniques for Control of Radon in New Residential Buildings

Model Standards and Techniques for Control of Radon in New Residential Buildings
This document is intended to serve as a model for use by the Model Code Organizations, States and other jurisdictions as they develop and adopt building codes, appendices to codes, or standards specifically applicable to their unique local or regional radon control requirements.

HTML Version | PDF Version (17 pp, 79 K) | EPA 402-R-94-009, March 1994


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


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Testing and Fixing Schools

Managing Radon in Schools

Managing Radon in Schools

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.

HTML Version | PDF Version (3 pp, 391 K) "Only available via the web." | June 2010


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.
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.

Download a copy of the document from NSCEP | EPA 625-R-92-016, June 1994


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

Radon Measurement in Schools

Radon Measurement in Schools (Revised Edition - Second Printing)
This report was prepared to provide school administrators and facilities managers with instructions on how to test for the presence of radon. The findings from EPA's comprehensive studies of radon measurements in schools were incorporated into these recommendations. This report superseded Radon Measurements in Schools - An Interim Report.

PDF Version (51 pp, 1.3 M) This document is only available on-line


reducing radon in schools: a team approach

Reducing Radon in Schools: A Team Approach
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.

Download a copy of the document from NSCEP | EPA 402-R-94-008, April 1994


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Technical Resources for Radon Professionals

These resources are intended primarily for professionals providing testing and mitigation services, credentialing organizations, trainers, researchers, state radon programs, and those in the broader international radon community of research and practice.

ASTM E-2121

To mitigate radon in homes, see ASTM E2121-12 Standard Practice for Radon Mitigation Systems in Existing Low-Rise Residential Buildings*.
Copies of E2121-12 may be purchased from ASTM International exiting EPA, or from the American National Standards Institute exiting EPA.

*American Society for Testing and Materials International, or ASTMI; an American National Standards Institute, or ANSI, approved consensus standard.
Note: As of May 2006, EPA's Radon Mitigation Standards (EPA 402-R-93-078, Revised April 1994) are no longer recommended or available.


Radon Reduction Techniques for Existing Detached Houses

Radon Reduction Techniques for Existing Detached Houses: Technical Guidance (Third Edition) for Active Soil Depressurization Systems
This technical guidance document has been prepared to serve as a comprehensive aid in the detailed selection, design, installation, and operation of indoor radon reduction measures for existing houses based on active soil depressurization techniques. It is intended for use by radon mitigation contractors, building contractors, concerned homeowners, state and local officials and other interested persons. Office of Research and Development

Download a copy of the document from NSCEP (TXT, 334 pp) | EPA 625/R-93-011, October 1993


Protocols for Radon and Radon Decay Product Measurements in Homes

Protocols for Radon and Radon Decay Product Measurements in Homes
This document presents the U.S. EPA's technical guidance for measuring radon concentrations in residences. It contains protocols for measuring radon for the purpose of deciding on the need for remedial action, as presented in the 1992 A Citizen's Guide to Radon, and in the Home Buyer's and Seller's Guide to Radon.

PDF Version (47 pp, 674 K) | EPA 402-R-92-003, May 1993* this is a corrected document number


Contractor Report: Radon Device Performance Check

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, MPF.

PDF Version (33 pp, 448 K) | July 2014

AARST - Measuring in Multifamily Building Protocols

For measuring radon levels in multifamily housing, see the ANSI/AARST Standard: Protocol for Conducting Radon and Radon Decay Product Measurements in Multifamily Buildings (MAMF-2010).

A single free printed copy of the ANSI-AARST MAMF-2010 is available from EPA upon request. Use EPA's document number (402-K/11-002) when ordering from the National Service Center for Environmental Publications. EPA reprints the MAMF-2010 with permission from the AARST National Radon Standard Consortium, PO Box 2109 Fletcher, NC. 28732.


Indoor Radon and Radon Decay Product Measurement Device Protocols

Indoor Radon and Radon Decay Product Measurement Device Protocols
This document provides information, recommendations, and technological guidance for anyone providing measurement services using 15 radon and radon decay product measurement methods. These protocols provide method-specific technological guidance that can be used as the basis for standard operating procedures.

HTML Version | EPA 402-R-92-004, July 1992


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.

Read the Report (PDF, 144 pp, 1.3 M) | Read the extended analysis (PDF, 51 pp, 1.8 M) May 20, 2009 | Appendix A (Correlation Matrices), B (Regression Results) and C (Moisture and Flow Data During Interzonal Flow Test Periods) (PDF, 21 pp, 1 M) May 20, 2009 | This report is only available on-line


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How to Order Publications

You can these publications from EPA's National Service Center for Environmental Publications (NSCEP)
Website: www.epa.gov/nscep
Phone: 1-800-490-9198 (M-F from 11:00 am-3:00pm eastern)
Fax: (301) 604-3408
Email: nscep@bps-lmit.com

Use the EPA Document Number when ordering from NSCEP.

View Frequent Questions, Ask a Question

Search frequently asked questions or submit your own question or comment in our Frequent Questions Database. In addition to questions and answers relating to indoor environments, you may use this database to find information on any of our topic areas, for example, Asthma, Radon, IAQ Tools for Schools, Mold, Smoke-free Homes, IAQ Design Tools for Schools, and General Indoor Air Quality Issues. You can also use this database to subscribe to any new information or updated information relating to any of the topics that may be posted on our website.

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Federal Radon Action Plan Health Risks Hotlines & Resources Test or Fix Your Home Kids, Students and Teachers Map of Radon Zones Media Campaigns National Radon Action Month Radon-Resistant New Construction Radon and Real Estate Radon in Drinking Water Radon Leaders Saving Lives State Radon Contacts State Indoor Radon Grants Indoor airPLUS Indoor Air Quality

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