What Is the Legal Alcohol Limit in Texas DWI Cases?

Many drivers in Longview know that “0.08” is associated with DWI laws, but fewer people fully understand what the legal alcohol limit actually means in Texas. A common misconception is that a driver cannot be arrested unless a breath or blood test shows a blood alcohol concentration above 0.08%. In reality, Texas law allows DWI arrests even when test results are lower than that number.

Under Texas law, a driver may be considered intoxicated in two different ways. First, prosecutors may attempt to show the driver had a blood alcohol concentration of 0.08% or greater. Second, prosecutors may argue the driver lacked the normal use of mental or physical faculties because of alcohol, drugs, prescription medications, or a combination of substances.

This means a person could potentially face DWI charges even with a test result below 0.08% if officers believe impairment existed.

Police officers investigating possible intoxication often rely on:
• Driving behavior
• Field sobriety testing
• Officer observations
• Statements made during the stop
• Breath or blood test results
• Video recordings

Officers may begin a traffic stop after observing behaviors such as weaving, speeding, delayed braking, or drifting between lanes. Once contact occurs, officers often look for additional signs they associate with intoxication, including slurred speech, bloodshot eyes, or the odor of alcohol.

Field sobriety tests frequently become part of the investigation. These roadside exercises are designed to evaluate balance, coordination, and attention. However, field sobriety testing is subjective and may be affected by many outside factors unrelated to alcohol consumption.

Fatigue, anxiety, medical conditions, injuries, uneven pavement, weather conditions, and age can all influence performance during roadside testing.

Breath and blood tests are also not automatically perfect. Breath testing machines require regular calibration and proper operation. Blood testing procedures must follow strict scientific and legal standards involving collection, storage, and laboratory analysis.

Several issues may affect chemical testing reliability, including:
• Improper calibration
• Contaminated samples
• Laboratory mistakes
• Medical conditions
• Timing issues during testing
• Improper maintenance procedures

Commercial drivers and drivers under the age of 21 face even stricter alcohol-related rules under Texas law. Certain lower alcohol levels may still create professional or legal consequences for those individuals.

Many people mistakenly believe they are safe to drive because they “feel fine.” Alcohol affects people differently depending on body weight, food consumption, medications, fatigue, and other factors.

An experienced Longview DWI defense attorney may investigate:
• Whether the traffic stop was lawful
• Whether testing procedures were properly followed
• Whether officer observations were reliable
• Whether evidence should be challenged
• Whether constitutional violations occurred

Understanding the legal alcohol limit is important, but every DWI case involves far more than a single number. Careful review of the evidence may reveal weaknesses or defenses that significantly affect the outcome of the case.

Call The Law Office of Alex Tyra, P.C. For Your Free Consultation

If you’ve been charged with DWI in Longview or anywhere in East Texas, don’t wait. The clock starts ticking the moment you’re arrested, and every decision you make from here on out matters. The Law Office of Alex Tyra, P.C. is ready to help you protect your future, your license, and your wallet.

Call us today at (903) 753-7499 to schedule your free consultation and take the first step toward fighting your DWI charges.