In Arizona, it is illegal to drive under the influence of alcohol if your blood alcohol concentration is .08% or higher. It’s also illegal to drive under the influence of any alcohol if you’re impaired in the slightest. If you’re pulled over and a DUI is suspected, the officer will typically request that you do field sobriety tests. You are not required to do this and can refuse if you wish. Additionally, the officer might also request that you take a portable breath test, which you are also not required to do.