Driving under the influence (DUI) is a serious offense in Colorado, and the state has strict laws and penalties to deter drunk driving.
Colorado DUI LawsIn Colorado, it is illegal to operate a vehicle with a blood alcohol concentration (BAC) of 0.08% or higher. If you are under 21, the legal limit is 0.02%. Commercial drivers are also held to a stricter standard, with a legal limit of 0.04%.