What is the legal limit for blood alcohol content for anyone under the age of 21?

For individuals under the age of 21, the legal limit for blood alcohol content (BAC) is set at less than 0.02%. This strict regulation is part of efforts to deter underage drinking and driving, recognizing that younger drivers may be less experienced and more vulnerable to the impairing effects of alcohol. This limit effectively creates a "zero-tolerance" environment concerning underage drinking and driving, meaning that even trace amounts of alcohol can lead to legal consequences.

Other potential BAC limits such as 0.08%, 0.05%, and 0.10% apply to individuals who are 21 years of age and older. These limits represent a standard threshold for determining impaired driving among the adult population. However, for individuals under 21, the goal is to promote safety and reduce the risks associated with underage alcohol consumption. Therefore, the correct answer highlights the zero-tolerance approach towards underage drinking and driving.