B.A.C. is blood alcohol content. Blood alcohol levels can vary greatly depending on the person. Some important factors range from body composition of fat, how long ago the last meal, and organ health functions. The state must prove a driver was intoxicated at the time of driving to prove DWI or DUI beyond a reasonable doubt.

Take a look at the following National Highway Traffic Safety Administration Blood Alcohol Level chart to determine BAC for Women and also separately BAC for Men. BAC is based on number of drinks over time. A BAC chart is only a guide based on a limited study. Individuals can vary based on other factors.

NHTSA’s Alcohol Effects Listed on Their Website

Blood Alcohol Concentration (BAC)1	Typical Effects	Predictable Effects on Driving
.02	Some loss of judgment Relaxation Slight body warmth Altered mood	Decline in visual functions (rapid tracking of a moving target) Decline in ability to perform two tasks at the same time (divided attention)
.05	Exaggerated behavior May have loss of small-muscle control (e.g., focusing your eyes) Impaired judgment Usually good feeling Lowered alertness Release of inhibition	Reduced coordination Reduced ability to track moving objects Difficulty steering Reduced response to emergency driving situations
.08	Muscle coordination becomes poor (e.g., balance, speech, vision, reaction time, and hearing) Harder to detect danger Impaired judgment, self-control, reasoning, and memory	Concentration Short-term memory loss Speed control Reduced information processing capability (e.g., signal detection, visual search) Impaired perception
.10	Clear deterioration of reaction time and control Slurred speech, poor coordination, and slowed thinking	Reduced ability to maintain lane position and brake appropriately
.15	Far less muscle control than normal Vomiting may occur (unless this level is reached slowly or a person has developed a high tolerance for alcohol) Significant loss of balance	Substantial impairment in vehicle control, attention to driving task, and in necessary visual and auditory information processing

Chart Source

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