Radon Mitigation Contractors in California

California licensing

California law requires anyone providing radon services to the public, including mitigation, to hold current NRPP or NRSB certification and to file proof of it with the California Department of Public Health, under Health and Safety Code Section 106780. Certificates must be resubmitted every two years. CDPH's Indoor Radon Program publishes a list of certified radon service providers.