Location Total Stops .08 BAC and over stops
.02 to .79 BAC Stops 129,291 282,903 1,697,580 1,472,630 3,302,096 1,698,622
Alabama Alaska Arizona Arkansas California Colorado
145,287 309,071
15,996 26,168
1,860,643 163,063
1,680,151
207,521
3,749,583 447,487 1,885,645 187,023 1,090,500 146,753
Connecticut
943,747 87,391 21,808
Delaware
99,467 22,331
12,076
D.C.
523
Florida Georgia Hawaii Idaho Illinois Indiana
1,407,351 573,407 225,362 197,595 989,894 253,713
164,396 81,886 15,799 26,071 175,274 33,796
1,242,955 491,521 209,563
Breath Alcohol Levels
State laws typically follow standards recommended by the National Highway Traffic Safety Administration to require ignition interlocks to be set at a lower threshold of .02 breath alcohol content (BAC) to prevent any drinking and driving occurrences. Since 2006, interlocks prevented over 44.2 million attempts to drive with a .02 BAC or greater, including 2.6 million in 2025 alone.
171,524 814,620 219,917
Iowa
2,377,708 324,243 1,447,085 162,277
2,053,465 1,284,808 169,872 1,156,205
Kansas
Kentucky Louisiana
193,698
23,826
1,359,344 203,139
Maine
122,612 1,121,534
24,460 112,069 61,454 39,996
98,152
Maryland
1,009,465 356,603 347,822 951,989 114,483 1,197,997
Massachusetts 418,057
Michigan Minnesota Mississippi Missouri Montana Nebraska
387,818
1,082,009 130,020
130,898
16,415
1,377,648 179,651
63,143
11,484 67,225
51,659
Since 2006:
621,265
554,040 286,786 104,905 1,066,919 805,621 634,794 351,807 33,427 297,535 923,871 529,379 661,412 106,693 209,828
Nevada
330,250 43,464
New Hampshire 129,776
24,871
New Jersey New Mexico
1,349,423 282,504
934,856 781,295
129,235 146,501 44,265
New York
Ignition interlocks have prevented 5,695,274 attempts to drive drunk with a BAC of .08 or greater.
North Carolina 396,072 North Dakota 36,291
2,864
Ohio
349,884
52,349
Oklahoma
1,058,896 135,025
Oregon
605,345
75,966 130,734 17,853 28,003
Pennsylvania 792,146 Rhode Island 124,546 South Carolina 237,831 South Dakota 14,531
2,571
11,960
Tennessee
1,377,526 153,223 3,877,884 534,108
1,224,303 3,343,776
Ignition interlocks have prevented
Texas Utah
317,639 161,621 412,957
38,012 16,802 44,792
279,627 144,819 368,165
44.2M
Vermont Virginia
attempts to drink and drive with a BAC of .02 or greater.
Washington 1,737,334 201,701
1,535,633 448,190 2,915,889
West Virginia 485,263
37,073
Wisconsin Wyoming
3,381,454 465,565
171,727
27,652
144,075
Total
44,257,416 5,695,274 38,562,142
8
Data collected by Mothers Against Drunk Driving from major interlock vendors. The time period is from December 1, 2006 to December 31, 2025
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