The legal blood alcohol content (BAC) for drivers younger than 21 years of age is:

For drivers under the age of 21, the legal blood alcohol content (BAC) limit is set at 0.02. This lower threshold is intentionally established to discourage underage drinking and driving. The rationale behind this stringent limit is that any detectable amount of alcohol can impair a young driver's ability to operate a vehicle safely. The aim is to promote safer driving behaviors among younger drivers, as they are statistically more likely to be involved in alcohol-related accidents.

In contrast, the regular legal limit for drivers 21 years and older is 0.08, which reflects a higher tolerance for adult drivers. Options like 0.05 and 0.10 are also higher limits that apply to adults and do not pertain to younger, inexperienced drivers who may be more susceptible to the effects of alcohol on judgment and motor skills. By maintaining a stricter BAC limit for those under 21, laws are reinforcing the critical importance of responsible drinking and driving practices among new drivers. This approach seeks to prevent the potential risks that can arise from even small amounts of alcohol consumption in those who are not yet legally considered adults.