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
Jurisdiction199819992000200120022003200420052006200720082009201020112012201320142015201620172018
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AK              
  • Jurisdiction: Alaska
  • Effective Date of Change: 9/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
ALNo Change
AR              
  • Jurisdiction: Arkansas
  • Effective Date of Change: 8/13/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
AZ              
  • Jurisdiction: Arizona
  • Effective Date of Change: 8/31/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
CANo Change
CO                          
  • Jurisdiction: Colorado
  • Effective Date of Change: 7/1/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                      
CT                  
  • Jurisdiction: Connecticut
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
DC     
  • Jurisdiction: District of Columbia
  • Effective Date of Change: 4/13/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                           
DE                          
  • Jurisdiction: Delaware
  • Effective Date of Change: 7/12/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                      
FLNo Change
GANo Change
HINo Change
IA                      
  • Jurisdiction: Iowa
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
IDNo Change
ILNo Change
IN              
  • Jurisdiction: Indiana
  • Effective Date of Change: 7/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
KSNo Change
KY           
  • Jurisdiction: Kentucky
  • Effective Date of Change: 10/1/2000
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                     
LA                      
  • Jurisdiction: Louisiana
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
MA                     
  • Jurisdiction: Massachusetts
  • Effective Date of Change: 6/30/2003
  • Change: Evidentiary rule changed to per se
  • Details
                                                           
MD              
  • Jurisdiction: Maryland
  • Effective Date of Change: 9/30/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
MENo Change
MI                      
  • Jurisdiction: Michigan
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
MN                              
  • Jurisdiction: Minnesota
  • Effective Date of Change: 8/1/2005
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                  
MO              
  • Jurisdiction: Missouri
  • Effective Date of Change: 9/29/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
MS                  
  • Jurisdiction: Mississippi
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
MT                     
  • Jurisdiction: Montana
  • Effective Date of Change: 4/15/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                           
NCNo Change
ND                      
  • Jurisdiction: North Dakota
  • Effective Date of Change: 8/27/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
NE              
  • Jurisdiction: Nebraska
  • Effective Date of Change: 9/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
NHNo Change
NJ                        
  • Jurisdiction: New Jersey
  • Effective Date of Change: 1/20/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                        
NMNo Change
NV                      
  • Jurisdiction: Nevada
  • Effective Date of Change: 9/23/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
NY                      
  • Jurisdiction: New York
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
OH                     
  • Jurisdiction: Ohio
  • Effective Date of Change: 6/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                           
OK              
  • Jurisdiction: Oklahoma
  • Effective Date of Change: 7/1/2001
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                  
ORNo Change
PA                      
  • Jurisdiction: Pennsylvania
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
RI          
  • Jurisdiction: Rhode Island
  • Effective Date of Change: 7/13/2000
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                      
SC            
  • 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
                                                          
SD                  
  • Jurisdiction: South Dakota
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
TN                      
  • Jurisdiction: Tennessee
  • Effective Date of Change: 7/1/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
TX      
  • Jurisdiction: Texas
  • Effective Date of Change: 9/1/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                          
UTNo Change
VANo Change
VTNo Change
WA    
  • Jurisdiction: Washington
  • Effective Date of Change: 1/1/1999
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                                            
WI                      
  • Jurisdiction: Wisconsin
  • Effective Date of Change: 9/30/2003
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                          
WV                         
  • Jurisdiction: West Virginia
  • Effective Date of Change: 5/5/2004
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                       
WY                  
  • Jurisdiction: Wyoming
  • Effective Date of Change: 7/1/2002
  • Change: BAC level decreased from 0.1 to 0.08
  • Details
                                                              
USNo Change