Idaho DUI Laws are strictly enforced and are stringent.  The amount of alcohol in your blood is only one indication that you are driving under the influence; incidentally, you can be charged with an Idaho DUI without ever having a drop to drink!  If you are exhibiting impairment and are under the influence of any intoxicating substance, including illegal and prescription drugs, you will be charged with DUI. 

Your BAC (Blood Alcohol Content) is used in determining a DUI in relation to the consumption of alcohol:

• Your BAC is .02% or more if you are under 21 years of age

• Your BAC is .04% or more and you are operating a commercial vehicle

• Your BAC is .08% or more and you are 21 or older

If your BAC exceeds .20%, more severe penalties will be imposed.