If your citation or paperwork says "Operating with a Prohibited Alcohol Concentration" rather than a standard OWI, you might be wondering whether that's a different charge, a lesser one, or something you should be more worried about. In Wisconsin, PAC is a real, separate criminal charge from OWI, and understanding exactly what it means matters for how you approach your defense.
Nero DUI Defense’s OWI defense lawyers help Wisconsin drivers navigate exactly this kind of charge. Call us today at (715) 318-7000 to talk through your specific situation.
PAC, Defined: Prohibited Alcohol Concentration
PAC stands for Prohibited Alcohol Concentration. In Wisconsin, operating with a PAC means driving a vehicle with a blood or breath alcohol concentration at or above the legal limit set by state law, regardless of whether the driver actually appeared impaired. Unlike OWI, which focuses on whether a driver was actually impaired, a PAC charge is based purely on the numerical result of a chemical test.
PAC vs. OWI: What's the Difference?
OWI, or Operating While Intoxicated, is based on evidence that a driver's ability to safely operate a vehicle was impaired by alcohol or drugs, which can include field sobriety test performance, driving behavior, and an officer's observations.
PAC, by contrast, is based specifically on a driver's blood or breath alcohol concentration meeting or exceeding the legal threshold under Wisconsin Statute § 346.63, regardless of how the driver appeared to be functioning.
A PAC charge can be proven largely through a chemical test result, while an OWI charge often relies more heavily on an officer's observations and field sobriety test performance.
Why You Can Be Charged With Both
Wisconsin prosecutors frequently charge both OWI and PAC arising from the same incident, since the two charges rely on different types of evidence and cover slightly different legal theories. Wisconsin law generally prevents a person from being convicted of, and sentenced under, both charges for the same incident, but being charged with both at the outset gives the prosecution multiple paths to a conviction if one charge proves harder to prove than the other.
Wisconsin's Prohibited Alcohol Concentration Limits
Wisconsin's PAC limits vary depending on a driver's prior OWI-related record. A driver with no prior offenses is generally held to the standard 0.08% limit, while drivers with certain prior convictions face a stricter 0.02% limit under Wisconsin's graduated penalty structure.
Commercial drivers operating a commercial motor vehicle are held to a lower 0.04% limit, and drivers under 21 are subject to Wisconsin's absolute sobriety law, which generally prohibits any measurable trace of alcohol at all. Understanding which specific limit applies to your situation is an important part of understanding the charge you are actually facing.
How the State Proves a PAC Charge
To secure a PAC conviction, the state generally needs to prove that the defendant was operating a motor vehicle and that a properly administered chemical test showed a blood or breath alcohol concentration at or above the applicable legal limit.
Because this charge relies heavily on the chemical test result itself, the accuracy and reliability of that test becomes central to the entire case.
Challenging the Evidence in a PAC Case
Because a PAC charge depends so heavily on chemical test evidence, defense strategies in these cases often focus closely on how that evidence was obtained and processed.
The Traffic Stop and Reason for the Arrest
An officer needs a valid legal basis to initiate a traffic stop and subsequently request a chemical test. If the initial stop or arrest was not properly justified, everything that followed, including the chemical test itself, may be subject to challenge and potential exclusion from the case.
Breath and Blood Test Accuracy and Procedure
Breath and blood testing equipment requires regular calibration and must be administered according to specific procedures. Errors in maintenance, calibration records, or the administration of the test itself can raise legitimate questions about whether the result accurately reflects the driver's actual alcohol concentration at the time of driving.
Chain of custody issues with blood samples can raise similar concerns. Because a PAC charge relies so directly on this test result, successfully challenging its accuracy can significantly affect the strength of the prosecution's case.
Penalties for a PAC Conviction in Wisconsin
Penalties for a PAC conviction generally mirror those for an OWI conviction and escalate with each subsequent offense. According to Wisconsin's OWI sentencing guidelines:
- First offense: Generally treated as a civil violation rather than a criminal charge, carrying fines and license revocation
- Second offense: Treated as a criminal misdemeanor, carrying fines, potential jail time, and a longer license revocation period
- Third offense: Escalating criminal penalties, including increased mandatory minimum jail time and fines
- Fourth and subsequent offenses: Increasingly severe criminal penalties, potentially including felony-level charges depending on the timing and nature of prior convictions
Our guides on first offense, second and third offense, and fourth and subsequent offense cases cover these escalating penalty structures in more detail.
Collateral Consequences Beyond the Court Case
Beyond the direct court-imposed penalties, a PAC conviction can carry lasting consequences, including significantly increased auto insurance premiums, complications with certain types of employment, particularly those requiring a commercial driver's license or a clean driving record, and a permanent mark on your driving and, in the case of repeat offenses, criminal record.
What to Do If You're Charged With Operating With a PAC
If you are facing a PAC charge, avoid assuming the chemical test result automatically means the case cannot be challenged, avoid discussing the details of your stop or arrest with anyone other than your attorney, gather any information you can recall about the stop, the testing process, and how you were treated during the arrest, and contact an experienced OWI defense attorney promptly to review the specific evidence in your case.
How a Wisconsin OWI/PAC Defense Attorney Can Help
Adam Nero is western Wisconsin's only attorney to focus his entire practice on the defense of OWI and PAC charges, and one of the few attorneys in the state to hold board certification through the National College for DUI Defense, a distinction earned through rigorous peer review and a demonstrated record of successful outcomes. He has twice completed the college's intensive OWI/DUI defense curriculum at Harvard Law School and has trained fellow attorneys nationally through the National Association of Criminal Defense Lawyers, giving him a depth of understanding few Wisconsin attorneys can match when it comes to closely examining the reliability of a chemical test result at the heart of a PAC charge.
An experienced Wisconsin OWI defense lawyer like Adam can closely examine the circumstances of your traffic stop, the administration of any field sobriety tests, and the accuracy and handling of your chemical test results, identifying weaknesses that could affect the strength of the state's case. Having now practiced in at least 60 Wisconsin counties, Adam welcomes the opportunity to defend OWI and PAC charges anywhere across the state, bringing the same relentless, personalized advocacy to every client he represents.
If you are facing an OWI or PAC charge in Wisconsin, do not wait to get legal guidance. Contact Nero DUI Defense at (715) 318-7000 for a consultation, and let us help you understand your options.
Frequently Asked Questions
What Does PAC Stand For in Wisconsin?
PAC stands for Prohibited Alcohol Concentration, a charge based on a driver's blood or breath alcohol level meeting or exceeding Wisconsin's legal limit, regardless of whether the driver appeared impaired.
What's the Difference Between an OWI and a PAC?
OWI is based on evidence that a driver's ability to operate a vehicle was actually impaired by alcohol or drugs, while PAC is based specifically on a chemical test result showing a blood or breath alcohol concentration at or above the legal limit.
Can I Be Convicted of Both OWI and PAC?
Wisconsin law generally prevents a person from being convicted of and sentenced under both charges arising from the same single incident, though prosecutors often charge both initially and proceed on whichever charge is stronger.
What Is the Legal PAC Limit in Wisconsin?
The standard PAC limit in Wisconsin is 0.08% for most drivers, though stricter limits apply depending on circumstances, including 0.02% for drivers with certain prior OWI-related convictions, 0.04% for commercial drivers operating a commercial vehicle, and Wisconsin's absolute sobriety standard for drivers under 21.
