Colorado Clean Indoor Air Act

Protecting your right to #BreatheFreeColorado since 2006

The Colorado Clean Indoor Air Act has been protecting you and your family from secondhand smoke since 2006. Marijuana smoking was added in the law in 2013. The law does not include prohibitions on indoor tobacco or marijuana vaping.


Smoking is prohibited in any indoor area, including but not limited to public places and buildings such as:

  • Restaurants, bars, retail and commercial establishments, grocery stores and food-service establishments, casinos, theaters, public and private educational institutions, public transportation of any kind and most workplaces unless specifically exempted.
  • Health care facilities, hospitals, clinics, doctors' offices, child day care facilities, indoor sports arenas, gymnasiums and auditoriums, limited gaming facilities (including bingo), pool halls and bowling alleys, meeting rooms, any public meetings, museums, libraries, courtrooms and in 75% of hotel or motel sleeping quarters rented to guests.
  • Lobbies, reception areas, hallways, elevators, restrooms, common-use areas (public and private), and the common areas of multi-unit residential, retirement and nursing facilities.
  • The 15-foot entry radius outside the main or front doorway of any establishment (unless defined differently by local law).

Exemptions include:

  • Businesses with three or fewer employees (or volunteers) who do not allow access to the public, retail tobacco businesses (includes hookah), cigar-tobacco bars opened before 2006 and up to 25% of rented hotel or motel rooms.


  • The outdoor area of any business excluding entryways, private homes, residences, autos unless being used for childcare or day care, limousines under private hire, and private non-residential buildings on a farm or ranch with an annual gross income of less than $500,000.


Click here for a copy of the law >

Some communities in Colorado have tougher restrictions on smoking and some also include vaping.  Learn more here >