Is Arizona a Zero Tolerance State for Alcohol?

A man holding a glass of whiskey on a shiny bartop

February 22, 2025
DUI

Arizona takes drunk driving very seriously with strict laws designed to keep roads safe. The state follows a zero-tolerance policy, which means police can arrest drivers even if their blood alcohol level is below the standard 0.08% limit when there are signs of impairment.

These laws are especially strict for young drivers under 21, who can face DUI charges for having any detectable amount of alcohol in their system. Commercial drivers must stay under a 0.04% limit to avoid penalties.

The penalties reflect Arizona’s firm stance on impaired driving. A first-time DUI can lead to fines up to $1,000, along with other consequences. Through strict enforcement and sobriety checkpoints, these laws aim to reduce alcohol-related accidents and fatalities across the state.

If you or a loved one was charged with a DUI in Arizona, you need the assistance of an experienced DUI attorney to get the best possible outcome for your case. Contact us today for a free case consultation to learn how we can help you!

Is Arizona a zero tolerance state for alcohol?

Arizona enforces strict zero tolerance laws for driving under the influence of alcohol. The state can charge drivers with DUI even if their blood alcohol level falls below the standard legal limit.

Definition and Scope of Zero Tolerance

Zero tolerance in Arizona means police can arrest drivers they believe are impaired by alcohol, regardless of blood alcohol concentration (BAC) levels.

The legal BAC limits vary by driver type:

Regular drivers (21+): 0.08%
Commercial drivers: 0.04%
Drivers under 21: Any detectable amount

A first-time DUI offense in Arizona carries significant penalties, including fines up to $1,000.

Police officers have authority to make arrests based on observed impairment, even when BAC tests show levels under 0.08%.

The law aims to keep roads safe by allowing enforcement before drivers reach the standard legal limit.

This strict approach sets Arizona apart from states that only enforce DUI at or above the 0.08% BAC threshold.

What is the Zero Tolerance Law in Arizona?

Arizona’s Zero Tolerance Law makes it illegal to drive with any detectable amount of alcohol or drugs in your system. This strict approach means you can face DUI charges even if your blood alcohol concentration (BAC) is below the standard 0.08% legal limit.

Under Arizona Revised Statute 28-1381, police officers can arrest drivers for DUI if they show signs of impairment, regardless of their BAC level. The law aims to prevent impaired driving and protect public safety.

The Zero Tolerance Law applies to:

Any amount of alcohol in your system
Illegal drugs
Prescription medications that cause impairment
Over-the-counter medicines that affect driving ability

Police look for these signs of impairment:

Unsafe driving patterns
Slurred speech
Poor balance
Failed field sobriety tests

A key part of this law is that officers only need to prove that a substance affected your driving “to the slightest degree.” This lower standard makes it easier for prosecutors to secure DUI convictions.

The Zero Tolerance policy reflects Arizona’s strong stance against impaired driving. Even small amounts of alcohol or drugs can lead to serious legal consequences.

Is there a Zero Tolerance law for Marijuana or Other Drugs in Arizona?

Arizona enforces strict zero tolerance laws for marijuana and other controlled substances while driving. This means any detectable amount of marijuana or its metabolites in a driver’s blood can result in DUI charges.

The law applies to both recreational users and medical marijuana cardholders. Even tiny amounts of THC or related compounds in the bloodstream can lead to arrest and prosecution under Arizona Revised Statutes Section 28-1381.

First-time offenders face a minimum of 24 hours in jail, with sentences potentially extending up to 6 months. Additional penalties may include fines, license suspension, and mandatory drug education programs.

For drivers under 21, Arizona maintains an especially strict zero tolerance stance. Any measurable amount of marijuana while operating a vehicle can trigger criminal charges for young drivers.

The state measures impairment through blood and urine tests. A level above 5 nanograms per milliliter of THC within 2 hours of driving typically leads to DUI prosecution.

This differs significantly from alcohol DUI laws, where drivers can legally operate vehicles with blood alcohol levels below 0.08%. With marijuana, no minimum threshold exists – any detectable amount can result in charges.

Why Did Arizona Adopt A Zero Tolerance Law?

The 1980s marked a turning point in how society viewed drunk driving. Before this time, people did not consider impaired driving as serious of an issue. Some states even lowered their drinking age to 18, which led to more deadly car crashes.

Public awareness grew as advocacy groups like Mothers Against Drunk Driving spoke up about the dangers of impaired driving. Their work helped change people’s attitudes about drinking and driving.

Arizona put its zero tolerance law in place in 1995 after the National Highway Systems Designation Act passed. The state wanted to take a strong stance against impaired driving to protect its residents.

The law first focused on young drivers under 21. Soon after, Arizona expanded it to include all drivers. This meant anyone with alcohol in their system could face charges, even if they were below the standard legal limit.

Key goals of the zero tolerance law:

Reduce drunk driving deaths
Discourage any drinking before driving
Make roads safer for everyone
Show Arizona’s serious approach to DUI enforcement

The law remains an important part of Arizona’s efforts to stop impaired driving and save lives on the state’s roads.

Charged with an Arizona DUI? Contact Queen Creek Law Firm

Queen Creek Law Firm handles DUI defense cases throughout Arizona. We serve clients in Queen Creek, Mesa, Phoenix, and surrounding communities.

Our experienced legal team understands the severe impact a DUI charge can have on your life. From potential jail time to license suspension and hefty fines, the consequences can be overwhelming.

Tyler M. Allen, our lead attorney, works directly with each client to build a strong defense strategy. We examine every detail of your case, from the initial traffic stop to the testing procedures.