DUI in Colorado
State-specific overview · Criminal Law
Colorado presumes impairment at 0.05% BAC, lower than the federal 0.08% standard.
How Colorado treats DUI
Colorado law establishes a lower impairment threshold than most states, creating a DUI charge at 0.05% blood alcohol content for drivers over 21. Drivers with a BAC between 0.05% and 0.08% face DUI charges under the "impaired to the slightest degree" standard. First-time offenders typically face license suspension, fines, and possible jail time. Colorado also enforces an Implied Consent law requiring breath or blood testing upon lawful arrest.
The general definition of DUI
Driving under the influence of alcohol or drugs, a serious criminal offense.
DUI stands for Driving Under the Influence and means operating a vehicle while impaired by alcohol, drugs, or both. You can be charged with DUI even if your blood alcohol level is below the legal limit if your driving is noticeably impaired. Penalties vary by jurisdiction and whether it's a first or repeat offense, but typically include fines, license suspension, jail time, and mandatory alcohol education programs. A DUI conviction has lasting effects on insurance rates, employment, and your driving record.
Read the full DUI entry →This page is a plain-English reference and is not legal advice. State laws change frequently. For specific situations consult a licensed attorney in Colorado.