Certified Radon Services Providers
Radon Program certifies all radon service providers operating in California.
California law requires all radon professionals to be approved by either the National Radon Proficiency Program (NRPP) or National Radon
Safety Board (NRSB).
There are no professional groups that are currently exempt from this
requirement, including Home Inspectors, Industrial Hygienists, Registered
Environmental Assessors (REAs), and Licensed Geologists.
California Department of Public Health does not endorse or recommend any company
or individual over another. As with any home service, you are
advised to get more than one estimate.
testers can provide test results faster than using a do-it-yourself test kit.
Use a professional tester during a real estate transaction. They are also
recommended for testing multi-family housing units, schools, non-residential
buildings, and anytime you want quick results. The testers listed here have met
their board requirements and are certified to operate in California:
mitigators listed below have met their board requirements and have met specific
CA Contractors License requirements. They are certified to operate in
note about Contractors Licenses: Mitigators must also have a valid California
Contractors License in one of a few specific categories. You can look up your contractor’s license here to
make sure it meets our requirements.
testers listed below have met their board requirements and are certified to
operate in California:
someone offers you radon testing or mitigation and they are not on the approved
lists here, they may NOT be certified to provide radon services in California.
To confirm a
certification, report a problem, or report a business selling radon services
without the proper Certification, email the radon program at firstname.lastname@example.org or call
person offering radon testing services, who is not a certified professional, is
in violation of CA Health and Safety Code sec 106790. Any test results would be
invalid for legal purposes. Violation of this regulation is considered a
misdemeanor and the individual may be fined up to $1,000, and their business
will reported to the appropriate consumer protection agency or licensing board.