Many people assume that if their blood alcohol concentration was under .08%, they cannot be charged with DUI in California. Unfortunately, DUI law is not always that simple.
In California, a DUI case may involve more than one theory. One part of the law focuses on whether a driver had a blood alcohol concentration (BAC) of .08% or higher. Another part focuses on whether the driver was under the influence while driving. That means a person may still face a DUI allegation even if the reported BAC was below the legal limit.
This does not mean every under-.08 case is strong. It means the facts, evidence, officer observations, testing procedures, and driving behavior all matter.
What Does “Under the Legal Limit” Mean?
For many adult drivers in California, the number most people recognize is .08% blood alcohol concentration. If a driver’s BAC is .08% or higher, prosecutors may charge the case based on the alcohol level itself.
But being under .08% does not automatically end the discussion.
A driver may still be accused of DUI if law enforcement claims alcohol affected the person’s ability to drive safely. This is sometimes where people get confused. The legal limit is important, but it is not the only issue in every DUI case.
For example, prosecutors may look at the driver’s behavior, speech, balance, coordination, driving pattern, field sobriety tests, chemical test results, and officer observations. They may argue that, even though the BAC was below .08%, the person was still impaired.
The defense may challenge that claim.
Can You Be Arrested if Your Blood Alcohol Content is Below .08%?
A DUI below the legal limit may be based on the claim that alcohol affected the driver’s ability to operate a vehicle safely. The prosecution may try to rely on evidence such as:
- Weaving, speeding, delayed braking, or other driving behavior
- The smell of alcohol
- Red or watery eyes
- Slurred speech
- Poor balance or coordination
- Field sobriety test performance
- Admissions about drinking
- Breath or blood test results
- Body camera or dash camera footage
- Statements from witnesses or officers
However, many of these observations can have innocent explanations. Fatigue, allergies, nervousness, illness, injury, medical conditions, uneven surfaces, poor lighting, and anxiety can all affect how a person looks or performs during a DUI investigation.
That is why the full context matters.
A Chemical Test Result Is Not the Whole Case
Breath and blood tests are important in DUI cases, but they are not always the final word. A reported BAC number may raise questions about timing, testing procedures, equipment maintenance, sample handling, or whether the result accurately reflects the person’s condition at the time of driving.
This can be especially important when the test result is below .08%.
For example, if the result is under the legal limit, the prosecution may rely more heavily on officer observations and driving behavior. The defense may then examine whether those observations were reliable, whether the testing was handled properly, and whether the evidence actually proves impairment.
If your case involves breath or blood test evidence, it is important to review how the test was administered, when it was taken, and whether the result supports the charge filed.
What About Alcohol Plus Drugs?
Some DUI cases involve a lower BAC combined with allegations of drug use. This may include marijuana, prescription medication, illegal drugs, or a combination of substances.
In these cases, prosecutors may argue that alcohol alone did not explain the impairment, but alcohol plus another substance affected the driver’s ability to drive safely.
This can make the case more complicated. Drug-related DUI cases often involve different evidence than alcohol-only cases. Instead of a straightforward breath alcohol result, the case may depend on blood testing, officer observations, drug recognition evaluation issues, prescription records, medical history, and the interpretation of impairment.
A drug DUI charge should not be treated as automatic proof of unsafe driving. The presence of a substance in a person’s system does not always prove that the person was impaired at the time of driving.
Can You Be Arrested for Being Under the Influence of Prescription Medication?
Yes. A driver may face a DUI allegation involving prescription medication, even if the driver drank little or no alcohol. A valid prescription does not automatically prevent a DUI charge.
Some medications can affect alertness, coordination, judgment, reaction time, or perception. Prosecutors may claim that a medication impaired the person’s driving, especially if the driver also had alcohol in their system.
But prescription drug DUI cases need careful review. Medication affects people differently. Dosage, timing, tolerance, medical condition, sleep deprivation, and whether the medication was taken as prescribed may all matter.
A defense lawyer may examine whether the prosecution can prove actual impairment, rather than simply pointing to the presence of medication.
Why Officer Observations Matter in Under-.08 DUI Cases
When a BAC result is below the legal limit, officer observations may become a major part of the prosecution’s case. The officer may describe the driver’s appearance, speech, movements, driving pattern, and performance on field sobriety tests.
But officer observations are not perfect. They are subjective and may be influenced by the stress of the stop, the environment, the officer’s assumptions, or other non-alcohol-related factors.
For instance, someone may appear nervous because they are being pulled over. Someone may have red eyes because of allergies, crying, fatigue, or irritation. Someone may perform poorly on balance tests because of age, injury, footwear, medical issues, or road conditions.
The defense may compare the officer’s written report with body camera footage, dash camera footage, chemical test results, witness statements, and other evidence.
Can You Face a Drivers License Suspension if Your Blood Alcohol Level is Under .08 and/or there are Drugs in Your System ?
The simple answer is no. The DMV can only suspend your license based upon a DUI if your is BAC .08% or greater.
How Can an Under-.08 DUI Case Be Challenged?
An under-.08 DUI case may be challenged in several ways, depending on the evidence.
Possible issues may include:
- Whether the officer had a lawful reason for the stop
- Whether there was probable cause for the arrest
- Whether field sobriety tests were reliable
- Whether the officer’s observations had innocent explanations
- Whether breath or blood testing was properly handled
- Whether the reported BAC supports the prosecution’s theory
- Whether drugs or medication actually caused impairment
- Whether body camera or dash camera footage contradicts the report
- Whether the prosecution can prove impairment beyond a reasonable doubt
Every case is different. Some cases may involve strong evidence for the defense. Others may require a more detailed review of testing, timing, officer conduct, or medical explanations.
Should You Take an Under-.08 DUI Seriously?
Yes. Even if your BAC was below the legal limit, a DUI charge can still create serious consequences. A first-time DUI charge may involve court dates, DMV issues, fines, probation, DUI education requirements, insurance consequences, and a criminal record if the case results in a conviction.
An under-.08 case may also create an opportunity for the defense to challenge the strength of the prosecution’s evidence. But that opportunity can be lost if the case is not reviewed carefully.
The safest approach is to have the arrest, testing, reports, and deadlines reviewed as early as possible.
Speak With a Murrieta DUI Defense Attorney
If you were arrested for DUI with a BAC under .08%, you may still have legal options. The prosecution must prove the case, and the evidence should be reviewed carefully before you make decisions about how to proceed.
The Law Office of H. Charles Gorian represents clients facing DUI charges in Murrieta, Temecula, and throughout Riverside County, San Bernardino County, and beyond. We can review the stop, officer observations, breath or blood testing, DMV issues, and other evidence that may affect your case.
Contact The Law Office of H. Charles Gorian today for a free, private, no-obligation consultation with a Murrieta DUI defense attorney.