A breath alcohol test measures how much alcohol is in the air you breathe out. It shows the current levels of impairment or intoxication of the person. Unlike drug testing, alcohol breath tests do not show past use. The device used in breath alcohol test measures how much alcohol content is in the blood.
Alcohol detection tests can measure alcohol
*in the blood for up to 6 hours *on the breath for 12 to 24 hours,
*urine for 12 to 24 hours (72 or more hours with more advanced detection methods),
*saliva for 12 to 24 hours, and hair for up to 90 days.