Utah has the strictest DUI laws in the United States, and they work differently from every other state's. This guide walks through the entire framework — the statute, the limits, the penalties, the license machinery, and the rules that decide how cases can end — with links to our in-depth guides on each piece.
The Core Statute: Utah Code § 41-6a-502
Utah's DUI law prohibits operating or being in actual physical control of a vehicle while (a) having a blood or breath alcohol concentration of .05 grams or greater, (b) being under the influence of alcohol, any drug, or their combination to a degree that renders you incapable of safely operating a vehicle, or (c) any combination of the two. Two things stand out. "Actual physical control" means you can be charged without driving — sleeping it off in a parked car can qualify. And "any drug" includes prescription medication you lawfully take, if the state claims it impaired you.
The 0.05% BAC Limit — Strictest in the Nation
Since December 30, 2018, Utah's per se limit has been 0.05% BAC — the lowest in America. Many adults reach 0.05 on two drinks. Commercial drivers are held to 0.04%, and drivers under 21 face Utah's "not-a-drop" law: any measurable alcohol suspends their license. The margin between legal and illegal is thin enough that breath-machine error ranges become a genuine defense issue in low-BAC cases.
The Metabolite Law
Utah Code § 41-6a-517 makes it an offense to drive with any measurable controlled substance or its metabolite in your body — no proof of impairment required. Because inactive THC metabolites linger for days or weeks, a sober driver can face a metabolite DUI long after any effect has passed. These charges have real constitutional and scientific vulnerabilities, but the statute is on the books and prosecutors use it.
Implied Consent and Test Refusal
By driving in Utah you've consented to chemical testing when an officer has grounds to request it. Refuse, and implied consent law imposes an 18-month license revocation for a first refusal — longer than the suspension for failing the test — and the refusal itself can be used against you in court. Roadside field sobriety tests, by contrast, are voluntary. Knowing which is which at the stop matters enormously.
Penalties by Offense
A first DUI is a class B misdemeanor: minimum 48 hours of jail, compensatory service, or home confinement; a fine of roughly $1,405 minimum with surcharge; screening and education; and a 120-day license suspension. A second offense within 10 years brings mandatory jail or monitored home confinement, a two-year suspension, and interlock. A third offense within 10 years — or a DUI causing serious injury — is a third-degree felony carrying prison exposure. Aggravating facts (a passenger under 16, a BAC of .16 or higher, driving the wrong way) stack additional consequences. Our penalties guide lays out the full grid.
The License System Runs on Its Own Clock
The criminal court is only half the system. The Driver License Division moves administratively — and faster. You have 10 calendar days from arrest to request a DLD hearing or your license is suspended automatically, before any judge hears the case. Suspensions, interlock-restricted status (typically 18 months after a first conviction), alcohol-restricted status, and reinstatement requirements all flow through the DLD. Winning the criminal case does not automatically undo license consequences, and vice versa.
How Utah Limits the Ways a DUI Can End
Utah law bars courts from accepting a plea in abeyance for DUI — the diversion tool available for many other charges is off the table. The most common favorable resolution is a reduction to impaired driving under § 41-6a-502.5, which carries lighter collateral consequences, or in weaker cases a reduction to reckless driving or outright dismissal. Which outcomes are realistic depends on the evidence — the stop, the breath test, the blood draw, and everything the officer did or didn't do correctly.
The 10-Year Lookback
Utah measures repeat offenses over a 10-year window: a prior DUI (or impaired driving conviction) within 10 years enhances the next one. A conviction also stays on your record — criminal history, driving record, and lookback are three separate clocks — and a DUI generally can't be expunged until 10 years after the case fully closes.
Where DUI Cases Are Heard
First and second DUIs are filed in justice courts — like the Ogden City Justice Court — with a right to a fresh trial in district court if the justice court outcome goes against you. Felony DUIs go straight to district court. We defend DUI cases in every judicial district in Utah.
What This Means If You've Been Charged
Utah's DUI framework is strict, but strictness cuts both ways: mandatory minimums, thin BAC margins, and rigid procedures create precise requirements the state must meet — and precise places where its case can fail. The two most important things you can do are act inside the 10-day window and put a defense attorney between you and the system before decisions harden. Cardon, Stuart & Associates defends DUI charges statewide from Ogden; consultations are free, confidential, reviewed personally by an attorney, and available 24/7. Se habla español. Call (801) 627-1110.