In July of 2021, Governor Polis signed HB21-1195. The law is regulated by DORA: the Colorado Department of Regulatory Agencies. On and after July 1, 2022, an individual is prohibited from practicing as a radon measurement professional or radon mitigation professional unless the individual is licensed by the director of the division of professions and occupations in the department of regulatory agencies. 

Colorado Office of Radon Professionals

Radon Professionals Flyer