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Blood Alcohol Content

DUI/DWI laws – May 2010
All 50 states and the District of Columbia have per se laws defining it as a crime to drive with a blood alcohol concentration (BAC) at or above a proscribed level, currently 0.08 percent (0.08 g alcohol per 100 ml blood).
See them here.

Effects At Specific B.A.C. Levels

The effects of alcohol intoxication are greatly influenced by individual variations among users. Some users may become intoxicated at a much lower Blood Alcohol Concentration (BAC) level than is shown.

  • 0.02-0.03 BAC: No loss of coordination, slight euphoria and loss of shyness. Depressant effects are not apparent. Mildly relaxed and maybe a little lightheaded.
  • 0.04-0.06 BAC: Feeling of well-being, relaxation, lower inhibitions, sensation of warmth. Euphoria. Some minor impairment of reasoning and memory, lowering of caution. Your behavior may become exaggerated and emotions intensified (Good emotions are better, bad emotions are worse)
  • 0.07-0.09 BAC: Slight impairment of balance, speech, vision, reaction time, and hearing. Euphoria. Judgment and self-control are reduced, and caution, reason and memory are impaired, .08 is legally impaired and it is illegal to drive at this level. You will probably believe that you are functioning better than you really are.
  • 0.10-0.125 BAC: Significant impairment of motor coordination and loss of good judgment. Speech may be slurred; balance, vision, reaction time and hearing will be impaired. Euphoria.
  • 0.13-0.15 BAC: Gross motor impairment and lack of physical control. Blurred vision and major loss of balance. Euphoria is reduced and dysphoria (anxiety, restlessness) is beginning to appear. Judgment and perception are severely impaired.
  • 0.16-0.19 BAC: Dysphoria predominates, nausea may appear. The drinker has the appearance of a “sloppy drunk.”
  • 0.20 BAC: Felling dazed, confused or otherwise disoriented. May need help to stand or walk. If you injure yourself you may not feel the pain. Some people experience nausea and vomiting at this level. The gag reflex is impaired and you can choke if you do vomit. Blackouts are likely at this level so you may not remember what has happened.
  • 0.25 BAC: All mental, physical and sensory functions are severely impaired. Increased risk of asphyxiation from choking on vomit and of seriously injuring yourself by falls or other accidents.
  • 0.30 BAC: STUPOR. You have little comprehension of where you are. You may pass out suddenly and be difficult to awaken.
  • 0.35 BAC: Coma is possible. This is the level of surgical anesthesia.
  • 0.40 BAC and up: Onset of coma, and possible death due to respiratory arrest.


Size and gender difference are reflected in the following estimated charts:

BAC Chart for Men

Men
Approximate Blood Alcohol Percentage
Drinks Body Weight in Pounds
100 120 140 160 180 200 220 240
0 .00 .00 .00 .00 .00 .00 .00 .00 Only Safe
Driving Limit
0 .00 .00 .00 .00 .00 .00 .00 .00
Only Safe Driving Limit
1 .04 .03 .03 .02 .02 .02 .02 .02 Driving
Skills
Significantly
Affected


Possible
Criminal
Penalties
2 .08 .06 .05 .05 .04 .04 .03 .03
3 .11 .09 .08 .07 .06 .06 .05 .05
4 .15 .12 .11 .09 .08 .08 .07 .06
5 .19 .16 .13 .12 .11 .09 .09 .08
6 .23 .19 .16 .14 .13 .11 .10 .09 Legally
Intoxicated


Criminal
Penalties
7 .26 .22 .19 .16 .15 .13 .12 .11
8 .30 .25 .21 .19 .17 .15 .14 .13
9 .34 .28 .24 .21 .19 .17 .15 .14
10 .38 .31 .27 .23 .21 .19 .17 .16 Death Possible
Subtract .01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer,
or 5 oz. of table wine.


BAC Chart for Women

Women
Approximate Blood Alcohol Percentage
Drinks Body Weight in Pounds
90 100 120 140 160 180 200 220 240
0 .00 .00 .00 .00 .00 .00 .00 .00 .00 Only Safe
Driving Limit
0 .00 .00 .00 .00 .00 .00 .00 .00 .00 Only Safe Driving Limit
1 .05 .05 .04 .03 .03 .03 .02 .02 .02 Driving Skills
Significantly
Affected


Possible
Criminal
Penalties
2 .10 .09 .08 .07 .06 .05 .05 .04 .04
3 .15 .14 .11 .10 .09 .08 .07 .06 .06
4 .20 .18 .15 .13 .11 .10 .09 .08 .08
5 .25 .23 .19 .16 .14 .13 .11 .10 .09
6 .30 .27 .23 .19 .17 .15 .14 .12 .11 Legally
Intoxicated


Criminal
Penalties
7 .35 .32 .27 .23 .20 .18 .16 .14 .13
8 .40 .36 .30 .26 .23 .20 .18 .17 .15
9 .45 .41 .34 .29 .26 .23 .20 .19 .17
10 .51 .45 .38 .32 .28 .25 .23 .21 .19
Death Possible
Subtract .01% for each 40 minutes of drinking.
One drink is 1.25 oz. of 80 proof liquor, 12 oz. of beer, or 5 oz. of table wine.




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