Cannabis DWI Laws in the USA for 2025
What is a Cannabis DWI?
A cannabis DWI, or Driving While Impaired by Cannabis, refers to operating a vehicle under the influence of cannabis. In 2025, the threshold for impairment is significantly lower than alcohol, often around 5 nanograms of THC per milliliter of blood.
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Laws by State
- California: Enhanced penalties for second and subsequent offenses.
- Colorado: Mandatory ignition interlock devices for all cannabis DWI convictions.
- Oregon: New laws require law enforcement to follow strict protocols when administering field sobriety tests.
Penalties and Enforcement
Penalties for cannabis DWI in 2025 include fines up to $10,000, mandatory community service, and possible imprisonment. Law enforcement agencies are increasing their efforts to detect and arrest cannabis DWI suspects, often using K-9 units and advanced breath testing devices.