
Arizona has a zero-tolerance policy for driving under the influence (DUI). The legal blood alcohol content (BAC) limit in Arizona is 0.08%, which is typically measured using breathalysers, blood tests, or urine tests. If your BAC measures 0.08% or higher, you can be charged with a DUI, even if you are not exhibiting any erratic driving behaviours. Arizona also enforces a zero-tolerance policy for alcohol use for drivers under 21, with a legal limit of 0.00%. If a minor is found drinking and driving, they will be prosecuted for DUI even if their BAC is below 0.08%.
| Characteristics | Values |
|---|---|
| Legal limit for DUI | 0.08 |
| Zero tolerance limit | 0.05 |
| Legal limit for drivers of commercial vehicles | 0.04% |
| Extreme DUI limit | 0.15% |
| Super Extreme DUI limit | 0.20% |
| Aggravated DUI | Felony |
| Minors | 0.00% |
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What You'll Learn

Arizona's legal blood alcohol limit
Arizona has a zero-tolerance policy for driving under the influence (DUI) of alcohol. The legal blood alcohol concentration (BAC) limit in Arizona is 0.08%. This means that if your BAC is 0.08% or higher, you can be charged with a DUI, even if you are not exhibiting any erratic driving behaviours. A BAC of 1.0% indicates that there is one gram of alcohol in every 100 milliliters of your blood.
The state's DUI laws are strict and carry harsh penalties. If you are facing DUI penalties for impairment while under the legal alcohol limit, it is important to contact a lawyer right away to assert your rights and receive proper defence. A DUI is a very serious offence and can result in jail time, fines, license suspension, and other consequences.
It is important to note that the legal BAC limit for commercial drivers in Arizona is far lower, set at less than 0.04%. Commercial drivers charged with a DUI may face legal penalties as well as consequences that affect their livelihood, such as the loss of their commercial driver's license (CDL).
Arizona also has a zero-tolerance policy for underage drinking and driving. For drivers under 21, any amount of alcohol in their system is illegal, and they can face DUI charges if their BAC is above 0.00%. Additionally, Arizona law allows for an "Extreme DUI" charge if a driver's recorded BAC is between 0.15% and 0.199%, with mandatory jail time, steep fines, and additional requirements such as the use of an ignition interlock device. An even higher BAC reading may result in a "Super Extreme DUI", with more severe penalties.
The factors that affect a person's BAC include gender, body weight, the amount of alcohol consumed, and the time since the first drink. It is important to understand how your body reacts to alcohol and to always make informed decisions about drinking and driving.
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DUI charges and penalties
In Arizona, the legal blood alcohol concentration (BAC) limit for driving is 0.08%. If your BAC is above this limit, you can be charged with a DUI, which stands for driving under the influence. This limit applies to anyone over the age of 21, while the 0.0% BAC restriction applies to minors. Any amount of alcohol in a minor's system can result in a DUI charge if they are detained, as the legal drinking age in Arizona is 21.
If you are pulled over and suspected of driving under the influence of alcohol or drugs, a law enforcement officer will request that you submit to a blood alcohol concentration (BAC) test. This can be done through a blood, breath, urine, or other bodily substance test. Refusal to take the chemical test may result in a suspension of your driver's license for one year for a first offense, and two years for a second or third offense.
If you are convicted of a DUI in Arizona, the penalties vary depending on the number of offenses and the specific circumstances. For a first offense, you may face jail time, fines, community service, and the requirement to undergo alcohol screening, education, or treatment. Your license will also be suspended for 90 days, and you will be required to equip any vehicle you operate with a certified ignition interlock device.
For a second or subsequent offense, the penalties increase. You may face a minimum of 90 days in jail, fines of at least $3,000, and a 12-month revocation of your license. You will also be required to undergo alcohol screening and treatment and equip your vehicle with a certified ignition interlock device. Additionally, you may be ordered to perform community service.
Arizona also has enhanced penalties for extreme DUI and super extreme DUI, which are based on higher BAC levels. An extreme DUI carries a minimum fine of $2,500 and 30 days in jail, while a super extreme DUI requires a $3,250 fine and 45 days in jail, even for a first offense.
It is important to note that DUI laws in Arizona are complex, and the specific penalties can vary depending on individual circumstances. If you are facing a DUI charge, it is crucial to seek legal representation as soon as possible to understand your rights and explore potential defenses.
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Zero-tolerance policy
Arizona has a zero-tolerance policy for driving under the influence (DUI). This means that even if your blood alcohol level is below the legal limit of 0.08%, an officer may still detain you if you exhibit signs of intoxication or impairment.
The zero-tolerance policy is enforced through Arizona Revised Statute 28-1381, which states that a blood alcohol concentration (BAC) of 0.05% or less "may be presumed that the defendant was not under the influence of intoxicating liquor". However, the zero-tolerance legislation allows officers to use their discretion in determining impairment, and they can arrest individuals even if their BAC is below the legal limit.
The legal limit for DUI in Arizona is 0.08%. This means that if your BAC is 0.08% or higher, you can be charged with a DUI, even if you are not exhibiting any erratic driving behaviors. This limit is estimated to be reached after about four drinks for a person with a smaller frame or who processes alcohol slowly, or about two drinks for a 160-pound woman, or three drinks for a 220-pound man.
For commercial drivers, the legal limit is far lower, set at less than 0.04%. This lower threshold acknowledges the need for greater control and concentration when operating a large vehicle or transporting goods and passengers. Drivers who hold a commercial driver's license (CDL) and are charged with a DUI face not only legal penalties but also consequences that can affect their livelihood, such as the loss of their CDL.
In Arizona, there is a zero-tolerance policy for alcohol use for drivers under 21. If their BAC is above 0.00%, they can face DUI charges as an underage driver. Any amount of alcohol in a minor's system can result in a DUI charge, and they will be prosecuted for driving under the influence if found drinking and driving, even if their BAC is below the legal limit.
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DUI testing methods
In Arizona, the legal blood alcohol limit for driving is 0.08%. If your blood alcohol content (BAC) is above this limit, you can be charged with a DUI. Even if your BAC is below the legal limit, an officer may still detain you if you show signs of intoxication or impairment.
Blood Tests
Blood tests are often used to measure BAC and detect the presence of drugs in the bloodstream. This method provides more accurate results compared to breath tests and is widely used in DUI cases. Blood testing methods include the alcohol dehydrogenase (enzymatic) method and the gas chromatography method. The gas chromatography method is highly accurate and reliable and is widely accepted in forensic laboratories and courts. This method measures the alcohol in the gas above the blood sample, known as the "headspace gas." A sub-sample of blood is mixed with an internal standard and heated, allowing the alcohol in the blood to equilibrate into the headspace gas, which is then analyzed to determine the BAC.
Breath Tests
Breath tests, also known as BrAC, are used to measure the amount of alcohol in the breath, which correlates with BAC. While breath tests are commonly used, they may not be as accurate as blood tests. Additionally, breathalyzer machines can sometimes be calibrated incorrectly, leading to unreliable results.
Field Sobriety Tests (FSTs)
FSTs are a battery of tests used by police officers to determine if a person is impaired due to alcohol or drug use. These tests assess balance, coordination, and the ability to divide attention during the test. Examples of FSTs include the walk-and-turn test, the one-leg stand test, and the horizontal gaze nystagmus test. FSTs are primarily used to establish "probable cause for arrest" and can be introduced as corroborating evidence of impairment. While you have the right to refuse an FST, the state can still penalize you for doing so. It's important to note that FSTs cannot determine specific substances a person has used.
Drug Metabolite Testing
In cases of suspected drug-impaired driving, law enforcement may conduct drug metabolite testing. This can be challenging because certain medications' metabolites can remain in a person's system for an extended period. Officers will need to use their judgment to determine whether the individual was impaired at the time of driving.
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Defending against charges
In Arizona, the legal blood alcohol limit for driving is 0.08%. If you are found to be driving with a blood alcohol concentration (BAC) above this limit, you can be charged with a DUI (driving under the influence). This limit is lower for commercial drivers, at 0.04%, and anyone under the age of 21 must have a BAC of 0.0%.
If you are facing DUI charges in Arizona, it is important to seek legal counsel as soon as possible. Here are some strategies that an experienced defense attorney may employ to defend against DUI charges:
Review of Chemical Test Results
To prove that you were driving under the influence, the prosecution typically relies on chemical test results, such as blood, breath, or urine tests. However, labs can make mistakes, and an attorney can review these results for any errors or discrepancies that could help build your defense.
Challenge Field Sobriety Tests
Field sobriety tests, such as assessing your demeanor or conducting a Standardized Field Sobriety Test, may also be used as evidence of impairment. A defense attorney can challenge the reliability of these tests, especially if there is no clear evidence of actual impairment.
Evaluate Breathalyzer Accuracy
Breathalyzer machines used in the field are sometimes calibrated incorrectly, which can lead to unreliable results. An attorney can investigate the calibration and maintenance records of the device used in your case to determine if the results can be trusted.
Examine Stop and Search Legality
In order for evidence obtained during a stop and search to be admissible, law enforcement must follow proper procedures and respect your constitutional rights. If your attorney can demonstrate that your rights were violated during the stop, it may be possible to have any evidence gathered excluded from the case.
Analyze Blood Alcohol Levels
Your attorney may also scrutinize the accuracy of your blood alcohol level readings. Factors such as your gender, body weight, and the time elapsed since your first drink can influence your BAC. An attorney can help determine if these factors were properly considered in your case.
If you are facing DUI charges in Arizona, it is important to remember that you have legal rights and options for defense. Contacting a qualified and experienced DUI defense attorney as soon as possible is a crucial step in protecting your rights and building a strong defense strategy.
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Frequently asked questions
The legal limit for alcohol in Arizona is a blood alcohol concentration (BAC) of 0.08%.
The legal limit for drivers of commercial vehicles in Arizona is less than 0.04% BAC.
Arizona has a zero-tolerance policy for minors, with a legal limit of 0.00% BAC. Any amount of alcohol in a minor's system can result in a DUI charge.
An "Extreme DUI" in Arizona is typically defined as a BAC of 0.15% or higher, while a "Super Extreme DUI" is a BAC of 0.20% or higher.
Yes, Arizona has a zero-tolerance policy, and an officer may detain you if you exhibit signs of intoxication or impairment, even if your BAC is below 0.08%.


































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