Can You Be Arrested for DUI Below 0.08% in California?
Most drivers assume that if their blood alcohol concentration (BAC) is below 0.08%, they cannot be arrested or convicted of driving under the influence (DUI). That assumption is incorrect. Under California law, a driver can absolutely be arrested—and even convicted—of DUI with a BAC below 0.08% if the prosecution can prove that alcohol, drugs, or a combination of substances impaired the driver's ability to operate a vehicle safely.
If you have been arrested for DUI in Chico, Butte County, or anywhere in Northern California, understanding how California's DUI laws work below the legal limit is critical.
Is 0.08% Always the Legal Limit?
For most adult drivers, 0.08% BAC is the level at which California law creates a presumption that the driver is under the influence. However, 0.08% is not a requirement for a DUI conviction.
California Vehicle Code section 23152(a) makes it illegal to drive while "under the influence" of alcohol. Unlike Vehicle Code section 23152(b), which specifically concerns driving with a BAC of 0.08% or higher, section 23152(a) focuses on impairment, not a specific number.
In other words, if alcohol has impaired your mental or physical abilities to such a degree that you can no longer drive with the caution of a sober person using ordinary care, you may be guilty of DUI—even if your BAC measures 0.05%, 0.06%, or 0.07%.
When Can Someone Below 0.08% Be Arrested?
A police officer does not need a breath or blood test showing 0.08% before making an arrest. Instead, officers consider the totality of the circumstances, including:
Driving behavior
Speeding or weaving
Traffic violations
The odor of alcohol
Slurred speech
Bloodshot or watery eyes
Difficulty following instructions
Field sobriety test performance
Statements made by the driver
Preliminary alcohol screening results
Admissions regarding drinking
If the officer believes these observations establish probable cause that you are impaired, an arrest may follow—even if later testing reveals a BAC below 0.08%.
What Happens if the BAC Is 0.05% or Lower?
California law generally provides that a BAC of 0.05% or less creates a presumption that the driver was not under the influence. However, this presumption is rebuttable. Prosecutors may still attempt to prove impairment by relying on other evidence, although doing so is often more difficult.
For example, the prosecution may argue that:
The alcohol was still being absorbed into your bloodstream.
Prescription medications enhanced the effects of alcohol.
Illegal drugs contributed to impairment.
Medical conditions affected the test results.
Every case depends on its unique facts.
What if the BAC Is Between 0.05% and 0.08%?
A BAC between 0.05% and 0.08% falls into something of a gray area. There is no automatic presumption that the driver is impaired, but there is also no presumption that the driver is sober.
Instead, prosecutors rely heavily on additional evidence, including:
Body-worn camera footage
Patrol vehicle dash camera video
Field sobriety test observations
Witness statements
Driving pattern
Officer testimony
Chemical test timing
Because these cases depend heavily on subjective observations, they often present significant opportunities for an experienced DUI defense attorney to challenge the prosecution's evidence.
DUI Involving Drugs or Prescription Medication
The 0.08% BAC threshold applies only to alcohol. California also prohibits driving under the influence of:
Marijuana
Prescription medications
Illegal drugs
A combination of alcohol and drugs
Unlike alcohol, California has no numerical legal limit for most drugs. Instead, prosecutors must prove that the substance impaired the driver's ability to operate a vehicle safely.
Many drivers are surprised to learn they can face DUI charges after taking medication exactly as prescribed.
Common Defenses in Below-0.08 DUI Cases
Cases involving BAC levels below 0.08% often present stronger defense opportunities than cases involving significantly higher alcohol levels. Potential defenses may include:
Lack of Impairment
Simply consuming alcohol is not illegal. The prosecution must prove actual impairment beyond a reasonable doubt.
Illegal Traffic Stop
If the officer lacked reasonable suspicion to stop the vehicle, evidence obtained after the stop may be challenged or suppressed.
Faulty Field Sobriety Tests
Many perfectly sober people perform poorly on field sobriety tests due to factors such as:
Fatigue
Anxiety
Poor balance
Medical conditions
Uneven pavement
Inappropriate footwear
Weather conditions
Rising Blood Alcohol
Alcohol takes time to absorb into the bloodstream. A driver's BAC at the time of testing may be higher than it was while actually driving. This "rising blood alcohol" defense can be particularly important in below-0.08% cases.
Medical Conditions
Certain medical conditions can mimic signs of intoxication or interfere with chemical testing, including diabetes, neurological disorders, inner ear conditions, and acid reflux.
Why You Should Not Assume a Below-0.08 DUI Is Easy to Beat
Although these cases often provide more avenues for defense, prosecutors regularly obtain convictions in DUI cases involving BAC levels below 0.08%. Each case turns on the quality of the evidence, the credibility of witnesses, and whether the prosecution can prove impairment beyond a reasonable doubt.
Early intervention by an experienced California DUI defense attorney can help identify weaknesses in the government's case, preserve favorable evidence, and protect your driving privileges.
Contact a Northern California DUI Defense Attorney
If you were arrested for DUI in Chico, Butte County, Glenn County, Tehama County, Yuba County, Sutter County, or elsewhere in Northern California—and your BAC was below 0.08%—do not assume the case is hopeless, but do not assume it will be dismissed either.
An experienced California DUI defense attorney can evaluate whether the traffic stop was lawful, examine the chemical testing procedures, review body camera footage, analyze field sobriety testing, and identify legal defenses that may lead to reduced charges or dismissal.
The sooner you begin building your defense, the more opportunities you may have to challenge the prosecution's case.
SEO Keywords
California DUI below 0.08, DUI under .08 California, DUI lawyer Chico, Chico DUI attorney, Northern California DUI lawyer, Butte County DUI attorney, Glenn County DUI lawyer, Tehama County DUI defense attorney, Yuba County DUI lawyer, Sutter County DUI attorney, California DUI defense lawyer, DUI arrest below legal limit, DUI with low BAC, California Vehicle Code 23152(a), impaired driving California, DUI attorney near me, first-time DUI California, DUI defense attorney, criminal defense attorney Chico, California criminal defense lawyer, rising blood alcohol defense, field sobriety test defense, breath test lawyer, blood alcohol concentration California, DUI consultation California.
