Blood Alcohol Concentration (BAC) Limits

Adult Operators of Noncommercial Motor Vehicles

Laws addressing blood alcohol concentration limits applicable to drivers of noncommercial automobiles, trucks, and motorcycles who have reached the legal drinking age of 21 years.

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Timeline of changes for Adult Operators of Noncommercial Motor Vehicles
Jurisdiction1998199920002001200220032004200520062007200820092010201120122013201420152016201720182019
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AlabamaNo Change
Alaska              
  • Jurisdiction: Alaska
  • Effective Date of Change: 9/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Arizona              
  • Jurisdiction: Arizona
  • Effective Date of Change: 8/31/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Arkansas              
  • Jurisdiction: Arkansas
  • Effective Date of Change: 8/13/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
CaliforniaNo Change
Colorado                          
  • Jurisdiction: Colorado
  • Effective Date of Change: 7/1/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
Connecticut                  
  • Jurisdiction: Connecticut
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
Delaware                          
  • Jurisdiction: Delaware
  • Effective Date of Change: 7/12/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
District of Columbia     
  • Jurisdiction: District of Columbia
  • Effective Date of Change: 4/13/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                               
FloridaNo Change
GeorgiaNo Change
HawaiiNo Change
IdahoNo Change
IllinoisNo Change
Indiana              
  • Jurisdiction: Indiana
  • Effective Date of Change: 7/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Iowa                      
  • Jurisdiction: Iowa
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
KansasNo Change
Kentucky           
  • Jurisdiction: Kentucky
  • Effective Date of Change: 10/1/2000
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                         
Louisiana                      
  • Jurisdiction: Louisiana
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
MaineNo Change
Maryland              
  • Jurisdiction: Maryland
  • Effective Date of Change: 9/30/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Massachusetts                     
  • Jurisdiction: Massachusetts
  • Effective Date of Change: 6/30/2003
  • Change: Evidentiary rule changed to per se
  • Details
                                                               
Michigan                      
  • Jurisdiction: Michigan
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
Minnesota                              
  • Jurisdiction: Minnesota
  • Effective Date of Change: 8/1/2005
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                      
Mississippi                  
  • Jurisdiction: Mississippi
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
Missouri              
  • Jurisdiction: Missouri
  • Effective Date of Change: 9/29/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Montana                     
  • Jurisdiction: Montana
  • Effective Date of Change: 4/15/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                               
Nebraska              
  • Jurisdiction: Nebraska
  • Effective Date of Change: 9/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
Nevada                      
  • Jurisdiction: Nevada
  • Effective Date of Change: 9/23/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
New HampshireNo Change
New Jersey                        
  • Jurisdiction: New Jersey
  • Effective Date of Change: 1/20/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                            
New MexicoNo Change
New York                      
  • Jurisdiction: New York
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
North CarolinaNo Change
North Dakota                      
  • Jurisdiction: North Dakota
  • Effective Date of Change: 8/27/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
Ohio                     
  • Jurisdiction: Ohio
  • Effective Date of Change: 6/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                               
Oklahoma              
  • Jurisdiction: Oklahoma
  • Effective Date of Change: 7/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
OregonNo Change
Pennsylvania                      
  • Jurisdiction: Pennsylvania
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
Rhode Island          
  • Jurisdiction: Rhode Island
  • Effective Date of Change: 7/13/2000
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                          
South Carolina            
  • Jurisdiction: South Carolina
  • Effective Date of Change: 1/1/2001
  • Change: Evidentiary rule changed to per se
  • Details
         
  • Jurisdiction: South Carolina
  • Effective Date of Change: 8/19/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
South Dakota                  
  • Jurisdiction: South Dakota
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
Tennessee                      
  • Jurisdiction: Tennessee
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
Texas      
  • Jurisdiction: Texas
  • Effective Date of Change: 9/1/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                              
Utah                                                                                   
  • Jurisdiction: Utah
  • Effective Date of Change: 12/30/2018
  • Change: BAC level decreased from 0.08 to 0.05
  • Details
 
VermontNo Change
VirginiaNo Change
Washington    
  • Jurisdiction: Washington
  • Effective Date of Change: 1/1/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                                
West Virginia                         
  • Jurisdiction: West Virginia
  • Effective Date of Change: 5/5/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                           
Wisconsin                      
  • Jurisdiction: Wisconsin
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
Wyoming                  
  • Jurisdiction: Wyoming
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
United StatesNo Change