The amount of alcohol in a person’s body is measured by the amount of the alcohol in his or her blood. This is called the blood alcohol concentration, or BAC.
In Wisconsin, a driver is considered legally impaired when his or her BAC is 80 milligrams of alcohol in 100 milliliters of blood (0.08). If a person's BAC is (0.08), the law presumes that the person is legally intoxicated. This means that any person stopped and arrested with a BAC of (0.08) is presumed to be intoxicated and therefore in violation of the law.
Even if a person does not have a BAC of (0.08) or more while operating a motor vehicle, a person can still be found guilty of an OWI in Wisconsin. If a prosecutor can show that the person was impaired, and that the person's impairment caused him or her to lack the ability to safely operate a motor vehicle, a person can be convicted.
This is a violation of Wis. Stat. 346.63 Operating under influence of intoxicant or other drug.
(1)?No person may drive or operate a motor vehicle while:
(a) Under the influence of an intoxicant, a controlled substance, a controlled substance analog or any combination of an intoxicant, a controlled substance and a controlled substance analog, under the influence of any other drug to a degree which renders him or her incapable of safely driving, or under the combined influence of an intoxicant and any other drug to a degree which renders him or her incapable of safely driving; or
(am) The person has a detectable amount of a restricted controlled substance in his or her blood.
346.63(1)(b)(b) The person has a prohibited alcohol concentration.
(1)?No person may drive or operate a motor vehicle while:
(a) Under the influence of an intoxicant, a controlled substance, a controlled substance analog or any combination of an intoxicant, a controlled substance and a controlled substance analog, under the influence of any other drug to a degree which renders him or her incapable of safely driving, or under the combined influence of an intoxicant and any other drug to a degree which renders him or her incapable of safely driving; or
(am) The person has a detectable amount of a restricted controlled substance in his or her blood.
346.63(1)(b)(b) The person has a prohibited alcohol concentration.
(1)?No person may drive or operate a motor vehicle while:
(a) Under the influence of an intoxicant, a controlled substance, a controlled substance analog or any combination of an intoxicant, a controlled substance and a controlled substance analog, under the influence of any other drug to a degree which renders him or her incapable of safely driving, or under the combined influence of an intoxicant and any other drug to a degree which renders him or her incapable of safely driving; or
(am) The person has a detectable amount of a restricted controlled substance in his or her blood.
346.63(1)(b)(b) The person has a prohibited alcohol concentrati
BAC levels are affected by many factors, including:
- How fast you drink. Alcohol consumed quickly will result in a higher BAC than when consumed over a long period of time.
- Gender. Women generally have less water and more body fat per pound of body weight than men. Alcohol does not go into fat cells as easily as other cells, so more alcohol remains in the blood of women.
- Body weight. The more you weigh, the more water is present in your body. This water dilutes the alcohol and lowers the BAC.
- Amount of food in your stomach. Absorption is slowed if you’ve had something to eat.
The amount of alcohol in a person’s body is measured by the amount of the alcohol in blood. This is called the blood alcohol concentration, or BAC.
For the purposes of law enforcement, BAC is used to define intoxication and provides a measure of impairment. In Ontario and the rest of Canada, the maximum legal BAC for fully licensed drivers is 80 milligrams of alcohol in 100 millilitres of blood (0.08). Driving with BAC in excess of 0.08 is a criminal offence.
BAC levels are affected by many factors, including:
How fast you drink. Alcohol consumed quickly will result in a higher BAC than when consumed over a long period of time.
Gender. Women generally have less water and more body fat per pound of body weight than men. Alcohol does not go into fat cells as easily as other cells, so more alcohol remains in the blood of women.
Body weight. The more you weigh, the more water is present in your body. This water dilutes the alcohol and lowers the BAC.
Amount of food in your stomach. Absorption is slowed if you’ve had something to eat.