Orange County DUI Lawyer Blog

California just passed its biggest set of DUI changes in years. In September 2026, Governor Newsom signed four bills aimed mostly at repeat offenders. Most of the changes to criminal penalties take effect January 1, 2027. If you have a prior DUI, a “wet reckless,” or a pending case in Orange County, these laws may change the risks you face. This post covers what changed, where the laws can be challenged, and how our firm defends people charged under them.

The Four New DUI Laws

AB 1546: A third DUI can now be a felony. Before this law, a third DUI within ten years could only be charged as a misdemeanor. A felony was not possible until the fourth. Starting January 1, 2027, a third qualifying DUI within ten years is a “wobbler,” which means the prosecutor can file it as either a misdemeanor or a felony. A fifth or later DUI within ten years becomes a straight felony. The felony sentencing range is 16 months, 2 years, or 3 years under Penal Code § 1170(h).

Intersections are among the most dangerous places on California roadways, and when an impaired driver enters the mix, the results are frequently catastrophic. Multiple lines of travel, left-turn conflicts, pedestrians, and split-second signal timing already make intersections high-risk locations. Add alcohol or drug impairment to that equation, and reaction time, judgment, and hazard perception all suffer at exactly the moment drivers need them most. For anyone facing a DUI charge stemming from an intersection collision in Orange County or elsewhere in California, understanding both the safety landscape and the available legal defenses is essential.

The Scope of the Problem

California has consistently ranked among the states with the highest number of alcohol-related crashes nationwide. State data shows more than 1,300 people die each year in impaired-driving collisions statewide, accounting for roughly a third of all traffic fatalities in the state, and DUI arrests have topped 120,000 annually in recent years. Intersections play an outsized role in this picture because they concentrate the conflict points where vehicles cross, merge, and turn across each other’s paths. Impaired drivers who misjudge a signal change, roll through a stop sign, or fail to yield at a green arrow create exactly the kind of T-bone and left-turn collisions that tend to produce serious injuries.

If you were just arrested for DUI in California for the first time, you’re probably scared, confused, and wondering what comes next. That’s completely understandable. A DUI arrest does not automatically mean a conviction, and there are steps you can take right now to protect yourself.

Quick Answer: What Happens After a First DUI Arrest in California?

After a first-time DUI arrest in California, two separate processes begin at the same time: a criminal court case and a DMV administrative hearing. You have only 10 days from the date of your arrest to request a DMV hearing, or your driver’s license will be automatically suspended. On the criminal side, you will face charges under Vehicle Code 23152, with possible penalties including fines, probation, DUI school, and jail time. An experienced DUI lawyer can challenge the evidence and potentially get your charges reduced or dismissed.

A DUI arrest involving children in the car can spill into family court very quickly, even if the criminal case is still pending. In many jurisdictions, police are required to notify child protective authorities when a young child is allegedly placed at risk. A four-year-old passenger especially increases the chance of a referral.

That does not automatically mean someone loses custody. But it can trigger investigations, emergency hearings, temporary restrictions, or court-ordered supervision.

Common family court consequences may include:

A DUI arrest in California does not automatically mean a conviction. One of the most powerful — and frequently successful — defense strategies is challenging the validity of the breath test. Breath testing technology, while widely accepted, is riddled with potential errors that an experienced DUI defense attorney can exploit. Understanding these vulnerabilities is critical for anyone facing charges under California Vehicle Code Sections 23152 or 23153.

How Breath Tests Work — and Where They Fail

California law enforcement primarily uses two devices: the Draeger Alcotest and the Intoxilyzer 8000. Both rely on infrared spectroscopy to estimate blood alcohol concentration (BAC) from a breath sample. The device measures ethanol molecules in deep lung air (alveolar air) and extrapolates a BAC using a partition ratio — the assumed ratio of alcohol in blood to alcohol in breath. California courts use a standardized partition ratio of 2,100:1, meaning 2,100 milliliters of breath contains the same alcohol as 1 milliliter of blood. The problem? This ratio varies significantly from person to person and even within the same individual depending on body temperature, lung capacity, and other physiological factors. A person with a higher-than-average partition ratio may produce a falsely elevated BAC reading.