Radon action guide for provinces and territories: Testing, outreach, engagement and professional certification

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Testing, databases and mapping

Canadian guidance and protocols on testing and mitigation

Guides for the general public on radon testing and mitigation

Technical guidance and studies on testing and mitigation

Testing as awareness

Community testing initiatives

These initiatives aim to assess radon prevalence in a community through sample testing of homes and other buildings (ranging from approximately 400 to 1,100 tests depending on community characteristics). They also improve awareness.

Ontario Health Units, in support of policy changes related to building codes. Examples include:

Citizen science projects

Library lending programs



Nova Scotia

Prince Edward Island

British Columbia

Health Canada has a Radon Library Lending Program Guide. Available on request, send email to radon@hc-sc.gc.ca.

Database and mapping initiatives

Public maps in Canada

International examples

Other maps, data sets and working groups

Education and awareness

A key component of addressing radon is ensuring that people know that it is a health risk and have the tools to act to remedy it. Many government agencies in Canada and around the world have radon education programs, information portals and outreach resources.

Radon web pages

Canada (Federal)

Canada (Provincial and Territorial)

Canada (Municipal and Regional)


Government resolutions

Educational programs can be strengthened by broad resolutions, such as legislation and declarations recognizing November as Radon Action Month in Canada.

In the United States, the Environmental Protection Agency declares January Radon Action Month and the Center for Disease Control focuses on Radon Awareness Week in late January.

Targeting at-risk audiences

Public health studies

Public Health Ontario undertook specific studies on the Environmental Burden of Cancer. This was accompanied by an academic article, Lung cancer risk of radon in Ontario, Canada: how many lung cancers can we prevent?, and production of accessible materials, Public Health Ontario: Radon Risks and Realities. A further result was the incorporation of radon education and awareness into Ontario’s Public Health Standards.

Courses for professionals

Radon laws that mandate governments to make educational materials

Alberta’s Radon Awareness and Testing Act, SA 2017, c R-2.5 (not yet signed into force), requires the government to develop educational materials explaining the health risks associated with exposure to radon for the public, and for purchasers in residential real estate transactions. The materials are to be developed in consultation with not-for-profit organizations, other levels of government and other stakeholders. They will identify methods of testing for radon and ways to reduce the risks of exposure to radon and encourage homeowners to test and mitigate. There are also provisions for government to communicate with the public, implement a public awareness campaign, partner with not-for-profit organizations to distribute educational materials; provide educational materials for use in schools; and other methods.

Eight U.S. States have similar laws mandating public education, including:

Recognizing certified radon professionals

Professional certification requirements 

In the United States, radon has been treated primarily as an issue of consumer protection. One outcome is that a central emphasis has been on mandatory certification of radon professionals. The following Table lists states with requirements for radon certification and the applicable statutes and/or codes.

Table 4: US states with mandatory certification for radon professionals
State Radon certification statute and/or codes
California Cal. Bus. & Prof. Code. Radon Certification. Sec. 106750 - 106795
Connecticut Conn. Gen. Stat. Ann. Sec. 20-420
District of Columbia D.C. Code Ann. Sec. 28-4201
Florida Fla. Stat. Ann. Sec. 404.056 (2)
Illinois Ill. Ann. Stat. Ch. 420 Sec. 44/25. Radon Industry Licensing Act Ill. Ann. Stat. Ch. II 422.10. Regulations for Radon Service Providers
Indiana IN Code § 16-41-38-2 (2019)

IN. Code Ann. 5.1-1-22

Iowa Iowa Code Ann. Sec. 64144.3(136B). Radon Testing
Kansas Kan. Stat. Ann. Sec. 48-16a01. Radon Certification Law
Kentucky KY. Rev. Stat. Ann. Sec. 211.9101- 211.9135
Maine ME. Rev. Stat. Ann. tit. 22 Radon Registration Act Sec. 772 to Sec 784
Maryland  MD Env Code § 8-305 (2018)
Minnesota Minnesota Statutes Sec. 144.4961 Minnesota Radon Licensing Act.
Montana Mont. Code Ann. Sec. 75-3-603. Montana Radon Control Act, Radon Testing and Mitigation Proficiency Listing Requirements
Nebraska Neb. Rev. Stat. 38-121 (kk)
New Hampshire N.H. Rev. Stat. Ann. Sec. 310-A:189-a
New Jersey N.J. Stat. Ann. Sec. 7:28-27.1 Certification of Radon Testers and Mitigators. N.J. Stat. Ann. 26:2D-71 Radiation Protection Act
New York N.Y. Comp. Codes R. & Regs. tit. 9 § 7930.3
Ohio Omo. Rev. Code Ann. Sec. 3723.02
Pennsylvania PA. Stat. Ann. tit. 68, 7503 (a)(5)  Radon Certification Act (act of July 9, 1987, P.L. 238, No. 43); 25 Pa. Code Chapter 240.
Rhode Island R.I. Gen. Laws. Sec. 23-61-5
Tennessee Tenn. Code Ann. Sec. 62-6-302
Utah Utah Code Ann. Sec. 58-55-305
Virginia VA. Code Ann. Sec. 54.1-201, VA. Code Ann. 32.1-229.01
West Virginia W. VA. Code Sec. 16-34-1

The wording of the statutes and codes varies considerably. However, it is possible to piece together general requirements which can also be used by Canadian provinces and territories seeking to implement a mandatory certification program.

In Canada, C-NRPP is already positioned to maintain national standards for radon professionals, and currently provides training, examinations, certification, registration, and technical standards (see C-NRPP List of Certifications). Provincial and territorial legislation covering radon professionals can make use of this existing structure by requiring (in legislation or regulation) that radon testing and mitigation services performed for a fee be done by C-NRPP certified professionals.

Professional contribution to radon databases and maps

Good databases of radon test results are an important component of understanding radon prevalence. These in turn can contribute to maps and other forms of public information that can guide homeowners, landlords, real estate professionals and others to be vigilant around radon. One important tool for building databases is to require radon testing and mitigation professionals to submit test results to centralized databases.

U.S. states require radon professionals to report test results to government agencies.

Table 5: US states with reporting requirements for radon professionals or laboratories
State Reporting requirement
Florida Florida Statutes, 2020 s. 404.056(2)(c) 
Illinois 420 ILCS 44/30 Ill. Admin. Code Section 422.110 
Indiana 410 Ind. Admin. Code 5.1-1-25 (d) and (f)
Iowa Iowa Code Ann. Sec. 64144.3 (136B.2)
Kansas Kan. Stat. § 48-16a10
Maine Maine Rev. Stat., tit. 22 (2) §778
Minnesota Minn. Admin. Rules 4620.7800
Nebraska Nebraska Administrative Code 180-11-004.01, 11-010
New Jersey N.J. Admin. Code § 7:28-27.28; New Jersey Statutes 26:2D-74.
New York 10 N.Y. Codes Rules & Reg. Section 16.130
Ohio Ohio Admin. Code 3701-69-13
Pennsylvania 25 Pa. Code § 240.303
Rhode Island 216-50-15 R.I. Code R. § 2.7.7

While each of these statutes or codes are written differently it is possible to describe general characteristics and best practices.

Canadian provinces and territories that wish to create reporting requirements should consult with C-NRPP and the Canadian Radon Database and Mapping Working Group on reporting requirements, methods for submitting data, and privacy and freedom of information concerns. Working with national standard setting organizations and groups can ensure national harmonization of standards and best practices are met.

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