What is 0.08 grams of alcohol? Understanding BAC and Impairment
                                
                                
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                                    4 min read                                
                            
                                Across the United States, driving with a Blood Alcohol Concentration (BAC) of 0.08% is illegal. This percentage, which corresponds to 0.08 grams of alcohol per 100 milliliters of blood, represents a state of significant impairment with serious consequences.