How high is a blood alcohol level for driving?

Now 0.8%. This legal limit varies by country and is typically blood alcohol content limit for the operation of a vehicle. In the United States, the legal limit can vary by state but for all states as of 2011 is 0.08% blood alcohol content as measured by a breath device, urinalysis or blood test.
Agree w Dr. Woods. Blood Alcohol Level- Currently in the US it is 0.08 % (in all states). In countries like Mali, Pakistan, United Arab Emirates (UAE) or Saudi Arabia it is 0.00 by Muslim Law. The only countries I could find with a higher Blood alcohol content % were Cyprus at 0.09 (but it is changing to 0.05) & Swaziland. You may have impairment at lower than 0.08.