Super Extreme DUI in Arizona: 0.20 BAC & Defense

What a super extreme DUI actually is

If a breath or blood test put your alcohol level at 0.20 or higher, you are at the top tier of Arizona’s DUI law, and the jail time is not a bluff. A super extreme DUI carries a mandatory 45 consecutive days behind bars, longer than the guaranteed minimum on many felonies. Yet the entire charge rests on a single number, and that number is more attackable than most people assume. For the full menu of Arizona DUI charges and every penalty tier, start with our Arizona DUI charges overview.

This guide is only about the 0.20-and-up tier. It skips the general “what is a DUI” material and focuses on what actually matters at this level: how super extreme differs from a standard or extreme DUI, what a 0.20 case looks like in Maricopa County, and the one defense that decides most of these cases, which is whether your BAC was truly 0.20 in the first place.

A super extreme DUI is a DUI committed with a tested blood alcohol concentration of 0.20 or more under A.R.S. § 28-1382(A)(2). It is not a separate crime. It is the top bracket inside Arizona’s extreme DUI statute, and Maricopa County prosecutors charge it automatically whenever the state’s chemical test reads 0.20 or above. That threshold is only two and a half times the 0.08 legal limit, so a heavy evening, not chronic drinking, is enough to reach it.

It is still a class 1 misdemeanor. A high BAC alone, even a 0.25 or a 0.30, does not make a DUI a felony. A charge only becomes an aggravated (felony) DUI when a separate factor from A.R.S. § 28-1383 is present, such as a suspended license, a passenger under 15, or a third DUI within 84 months. Absent one of those factors, a 0.20 stays a misdemeanor no matter how high the number climbs.

How does 0.20 differ from an extreme or standard DUI?

The difference is the mandatory jail floor the judge cannot go below. Arizona stacks its DUI penalties by tested BAC, so identical driving is punished more harshly as the number rises. All three tiers are class 1 misdemeanors, but the guaranteed jail is very different.

• Standard DUI (0.08 to under 0.15): a first-offense minimum measured in days that can be largely suspended, plus interlock and fines.
• Extreme DUI (0.15 to under 0.20): a first-offense minimum of 30 consecutive days in jail, reducible to as few as 9 days with an interlock, under A.R.S. 28-1382(A)(1).
• Super extreme DUI (0.20 and above): a first-offense minimum of 45 consecutive days in jail, reducible to as few as 14 days with an interlock, under A.R.S. 28-1382(A)(2).

That jump from 30 to 45 mandatory days is the whole reason the 0.20 line is worth fighting over. If your true reading was near the threshold, moving it below 0.20 drops you into the extreme tier and cuts the mandatory floor by more than two weeks. An extreme DUI lawyer in Phoenix handles exactly that kind of tier fight.

What a 0.20 super extreme DUI really costs

A first-offense super extreme DUI carries a mandatory minimum of 45 consecutive days in jail, a base fine, several statutory assessments, and a certified ignition interlock device for at least 12 months. These are floors set by statute, so on a conviction the judge cannot sentence below them. The penalties below are the ones unique to this tier; the broader first-offense DUI framework lives on the hub page above.

Why the exact BAC number matters so much at this tier

At 0.20, a difference of a single hundredth of a point changes your mandatory sentence. A 0.199 result is an extreme DUI with a 30-day floor. A 0.20 result is a super extreme DUI with a 45-day floor. Same night, same driving, same person, but 15 more guaranteed days in jail because of where one decimal landed.

That is why a super extreme case is really a fight over a measurement, not a fight over whether you had been drinking. Breath and blood testing both carry a margin of error, and a reading reported as 0.20 may reflect a true value on either side of the line once that uncertainty is accounted for. When the number sits close to 0.20, pushing it down does not just look better, it legally moves you to a lower tier with a lower mandatory minimum.

The single most important defense: attack the BAC number

The strongest defense to a super extreme DUI is to challenge whether your BAC was truly 0.20 or higher, because that one figure drives the entire mandatory sentence. Defense attorneys in Maricopa County courts commonly focus on a handful of pressure points where a 0.20 reading breaks down.

Breath machine calibration, maintenance, and the observation period

Breath instruments only produce a valid result when they are properly calibrated, maintained, and operated. Arizona procedure requires a continuous observation period before the test, usually 15 minutes, during which the person cannot burp, belch, vomit, or put anything in their mouth, because residual mouth alcohol can spike a reading. Gaps in the maintenance logs, a skipped or shortened observation period, or a machine overdue for calibration can undermine a 0.20 result and support moving it to a lower tier. Our breath test and Intoxilyzer defense page goes deeper on how these challenges work.

Blood draw, storage, and chain of custody

Blood cases have their own weak points. Blood must be drawn by qualified personnel, preserved with the correct anticoagulant and preservative, stored properly, and tracked through an unbroken chain of custody. Improper storage or fermentation can raise a reported alcohol level, and an independent review of the vial and the lab’s gas chromatography can expose a number that reads higher than the true value.

Rising BAC

Alcohol keeps absorbing for a period after the last drink, so your BAC at the police station can be higher than it was behind the wheel. If you were still absorbing when you were tested, your true driving-time BAC may have been below 0.20 even though the station reading crossed it. This rising-BAC argument is often decisive precisely at the 0.20 boundary.

Medical and physiological conditions

Certain conditions distort breath testing. Acid reflux and GERD can push alcohol vapor from the stomach up into the breath sample and inflate the result. A low-carbohydrate or keto diet, and uncontrolled diabetes, can cause the body to produce acetone-based compounds that some breath machines misread as alcohol. These issues are worth investigating whenever a breath reading lands near the super extreme line; our medical defenses to a DUI breath test page covers them in detail.

How Maricopa County prosecutors treat 0.20+ cases

Maricopa County prosecutors tend to treat a clean 0.20-plus reading as a strong case and do not give away the super extreme allegation lightly. In practice, the enhancement usually comes off only when the defense gives them a reason: a documented calibration or maintenance problem, a flawed observation period, a rising-BAC issue, or a suppression motion that threatens the stop or the test itself.

When the science holds up, offers often keep the tier intact and negotiate around the edges, such as jail structure or terms. When the science is genuinely in doubt, a reduction from super extreme to extreme, which lowers the mandatory floor from 45 days to 30, is a realistic goal. That is why early work on the test evidence matters more than anything you can say at sentencing.

What to do in the first 72 hours

The first three days after a 0.20 arrest set up your defense and protect your license. A few concrete steps matter more than the rest:

• Handle the license clock. A DUI arrest triggers a separate MVD process with a short window to request a hearing. Missing it can cost your license regardless of what happens in criminal court.
• Preserve the evidence. Write down everything you remember, what you ate and drank and when, any medical conditions, and the timeline, while it is fresh. These details feed the rising-BAC and medical defenses.
• Do not talk yourself into a worse case. You are not required to explain your night to the officer or a prosecutor. Statements about how much you drank routinely make a 0.20 case harder to fight.
• Get the test records requested early. Maintenance logs, calibration records, and the observation-period documentation are the heart of the case, and a lawyer can start demanding them right away.

How Tamou Law Group defends super extreme DUI charges

Tamou Law Group defends these cases by going straight at the 0.20 number, because moving the reading below the line moves the whole case to a lower tier before sentencing is ever on the table. Our team includes former prosecutors and public defenders who have handled high-BAC DUIs from both sides in Maricopa County, so we know how the state builds a 0.20 case and where those cases tend to be weakest.

We pull the maintenance and calibration records for the testing instrument, bring in independent forensic review when the science is in dispute, and litigate the stop and the test when the constitutional issues are there. If you want to see how we approach this specific charge, read more about working with a super extreme DUI lawyer in Phoenix, then call us before your arraignment so we can protect your license and start on the evidence right away.