What are the 3 tests used to determine BAC?

The three common tests used to determine Blood Alcohol Concentration (BAC) are breath tests, blood tests, and urine tests. Breath tests, often conducted with a breathalyzer, measure the amount of alcohol in exhaled air. Blood tests analyze a blood sample for alcohol content, providing a direct measurement of BAC. Urine tests can indicate alcohol presence but may be less accurate for determining current impairment compared to breath and blood tests.