
In the state of Arizona, the legal blood alcohol concentration (BAC) limit for driving is 0.08%. This limit is in line with all other states and is an attempt to prevent injuries, death, and property damage stemming from impaired driving. If a driver is found to have a BAC of 0.08% or greater, they will be charged with a driving under the influence (DUI) offense, regardless of how sober or unimpaired they may feel. For commercial drivers, the limit is lower, at 0.04%. Arizona also has a zero-tolerance policy for minors, where any amount of alcohol in a minor's system can result in a DUI charge.
| Characteristics | Values |
|---|---|
| Legal alcohol limit for adults in Arizona | 0.08% |
| Legal alcohol limit for commercial vehicle drivers | 0.04% |
| Legal alcohol limit for minors | 0.00% |
| BAC level for a Super Extreme DUI | 0.20% |
| Jail term for Super Extreme DUI | Minimum 45 days |
| Penalties and costs for Super Extreme DUI | $3,240 |
| License revocation for Super Extreme DUI | 90 days |
| Ignition interlock device requirement for Super Extreme DUI | 18 months |
| Jail term for first DUI offense | Minimum 10 days |
| Fine for first DUI offense | Minimum $1,250 |
| Jail term for second DUI offense | Minimum 90 days |
| Fine for second DUI offense | Minimum $3,000 |
| Jail term for third DUI offense | Minimum 120 days |
| Fine for third DUI offense | Minimum $3,250 |
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What You'll Learn

Arizona's legal alcohol limit
Arizona's legal blood alcohol limit is 0.08%. This limit is in place to prevent injuries, death, and property damage stemming from impaired driving. This limit applies to anyone over the age of 21, and a BAC of 0.0% applies to minors. Driving with a BAC of 0.08% or higher is a driving under the influence (DUI) offense in Arizona, regardless of how sober or unimpaired the driver may feel. The legal limit for drivers of commercial vehicles is lower, set at less than 0.04%.
In Arizona, a DUI offense is subject to zero-tolerance enforcement, as stated in ARS 28-1381. This means that even if your blood alcohol level is below the 0.08% legal limit, an officer may still detain you if you exhibit signs of intoxication or impairment. Arizona law enforcement uses two methods to determine blood alcohol concentration levels: a breath test and a blood test. Refusal to submit to any tests when arrested for a DUI will result in the automatic loss of driving privileges for 12 months, or 24 months for a second refusal within 84 months.
The penalties for a DUI in Arizona can be severe. For a first offense, you will be jailed for not less than 10 consecutive days and fined not less than $1,250. You will also be required to undergo alcohol screening and treatment and perform community service. The penalties increase for second and subsequent offenses, with a minimum of 90 days in jail, a minimum fine of $3,000, and a 12-month license revocation. Additionally, your vehicle must be equipped with a certified ignition interlock device.
Arizona also has enhanced penalties for "Extreme DUI" and "Super Extreme DUI," which are more severe forms of driving under the influence. A Super Extreme DUI is defined as a BAC reading of 0.20% or higher, with a minimum jail term of 45 days, fines and costs totaling approximately $3,240, a 90-day license revocation, and the requirement to use an ignition interlock device for 18 months.
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DUI charges and penalties
In Arizona, a person over the age of 21 with a Blood Alcohol Concentration (BAC) of 0.08% or greater is considered to be driving under the influence (DUI). For commercial drivers, the limit is lower at 0.04%, and for those under 21, there is a zero-tolerance policy, with any amount of alcohol in their system resulting in a DUI charge.
Arizona has a zero-tolerance policy for DUI, and the state's laws are among the strictest in the country. Even if your BAC is below the legal limit, you can still be charged with a DUI if you exhibit signs of intoxication or impairment. This is known as being "impaired to the slightest degree." Refusing to submit to a blood alcohol content (BAC) test will result in an automatic license suspension for 12 months for the first offense and 24 months for a second refusal within 84 months.
The penalties for a DUI in Arizona vary depending on whether it is a first, second, or subsequent offense. For a first offense, you will face a minimum of 10 days in jail and a fine of at least $1,250. Your license will be revoked, and you will be required to complete alcohol screening and education and perform community service. Additionally, you may be ordered to equip any vehicle you operate with a certified ignition interlock device.
For a second or subsequent offense, the penalties increase. You will face a minimum of 90 days in jail and a fine of at least $3,000. Your license will be revoked for 12 months, and you will be required to undergo alcohol screening and education. You will also be ordered to perform community service and may be required to equip your vehicle with an ignition interlock device.
Arizona also has enhanced penalties for extreme DUI and super extreme DUI, which are more severe forms of impaired driving. For a super extreme DUI, with a BAC of 0.20% or higher, the minimum jail term is 45 days, and the total penalties and costs amount to approximately $3,240. Your license will be revoked for 90 days, and you will be required to use an ignition interlock device for 18 months.
It is important to note that DUI laws and penalties can change over time, and it is always best to seek legal advice from a qualified attorney if you are facing DUI charges.
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Defenses against drunk driving charges
In Arizona, a person is considered to be driving under the influence (DUI) if their blood alcohol concentration (BAC) is 0.08% or higher. For commercial drivers, the legal limit is lower, at 0.04% BAC.
- Discrepancy in Tested Alcohol Levels: There may be a disconnect between the actual amount of alcohol consumed and the levels indicated by the breathalyzer or field sobriety tests. Breathalyzers, for instance, have a high margin of error and are not accepted in legal proceedings.
- No Visible Impairment: There may be no evidence of actual impairment, which could cast doubt on the reliability of the tests performed.
- Unlawful Stop or Rights Violation: A good defense attorney will consider whether the evidence was obtained legally. If the police stopped you unlawfully or violated your constitutional rights, the evidence may not be admissible in court.
- Inaccurate Testing: Oftentimes, breathalyzer machines are calibrated incorrectly, leading to unreliable results. Attorneys may also question whether the police officer administering the test had undergone proper training.
- Lab Errors: If your case involves blood or breath samples, an experienced DUI defense attorney can review the lab results to determine if any errors were made.
- Failure to Prove Impairment: To prove you were guilty of a DUI in Arizona, the prosecution must show that you were under the influence of alcohol or drugs. An attorney may be able to defeat the case by explaining how the prosecution failed to establish this.
Remember, impaired driving in Arizona can lead to serious criminal and administrative penalties, so it is important to seek legal assistance as soon as possible if you are facing DUI charges.
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How to calculate your BAC
In Arizona, the legal blood alcohol limit is a BAC of 0.08%. A BAC reading of 0.20% or higher is considered a Super Extreme DUI, with a minimum jail term of 45 days. For commercial drivers, the limit is much lower, at less than 0.04%.
It's important to note that you can still be charged with a DUI in Arizona even if your BAC is below the legal limit. Conversely, if your BAC is 0.05% or lower, it may be inferred that you weren't under the influence of alcohol. If you are a minor, you must not have any detectable amount of alcohol in your system when driving.
There are many variables that influence your BAC, including body weight, gender, ethnicity, health history, and recent meals. Additionally, the type of drink you consume matters; a shot of liquor may impact your BAC more significantly than a beer or a seltzer. For each drink, you can expect your BAC to increase by around 0.02, so you will likely reach the legal limit after four drinks.
While there are charts and formulas to help you estimate your BAC, these are rough estimates and do not account for all the variables that affect BAC. The Widmark Formula, for example, assumes you are drinking "standard" sized drinks and takes into account the rate at which alcohol is metabolized, which is 0.015% per hour for everyone. However, it's important to remember that these calculations are not always accurate and are meant to be used as a guide.
If you are arrested or charged with a DUI, it is important to contact an attorney right away. A good defense attorney will consider if the evidence was obtained legally and if the breathalyzer or field sobriety tests were administered correctly.
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Arizona's zero-tolerance policy
Arizona has a zero-tolerance policy for driving under the influence of alcohol. This means that police officers can arrest drivers if they believe they are impaired by alcohol, regardless of their blood alcohol concentration (BAC) levels. The state can charge drivers with a DUI even if their BAC is below the standard legal limit of 0.08%. This limit is the same across all states and is an attempt to prevent injuries, death, and property damage stemming from impaired driving.
The zero-tolerance policy in Arizona is enforced through strict laws and penalties designed to keep roads safe. A first-time DUI can lead to fines of up to $1,000, along with other consequences. The state also has enhanced penalties for "Extreme DUI" and "Super Extreme DUI", which are more severe forms of impaired driving. For example, a Super Extreme DUI is defined as a BAC reading of 0.20% or higher, with a minimum jail term of 45 days and penalties and costs totaling around $3,240.
The BAC level is a measurement of how much alcohol is in a person's bloodstream. It is the gold standard for medical and legal applications in the United States, with one BAC of 1.0% indicating one gram of alcohol in every 100 milliliters of blood. The number of drinks it takes to reach a BAC of 0.08% varies depending on factors such as weight, size, and height. For a 160-pound woman, it would take about two drinks, while a 220-pound man could consume three drinks and reach the same BAC level.
The state's zero-tolerance policy is reflected in the number of arrests made against drunk drivers. In 2014, there were approximately 23,000 arrests made, which could have helped save lives. However, some people may view these rules and penalties as strict. It is important to understand the basics of BAC and how it can impact a person's driving abilities to avoid facing charges and to keep the roads safe.
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Frequently asked questions
The legal Blood Alcohol Concentration (BAC) limit in Arizona is 0.08%.
If your BAC is over 0.08%, you can be charged with a DUI (driving under the influence) offense in Arizona. This applies even if you do not feel intoxicated.
A Super Extreme DUI in Arizona is defined as a BAC reading of 0.20% or higher. The penalties for a Super Extreme DUI include a minimum jail term of 45 days, fines and costs totaling around $3,240, and license revocation for 90 days.














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