Knowing the Legal Limit

A person's BAC is the percentage amount of alcohol found in his or her bloodstream. All 50 states and the District of Columbia have set a BAC limit.

Most states have a legal limit of 0.08 for citizens over age twenty-one. States like Delaware, Minnesota and Colorado allow a BAC limit of 0.10, although Congress has passed a national standard of 0.08 that links highway funds with compliance. Congress's actions were based on a significant amount of research which indicated that at a BAC of 0.08, the average person's driving ability is impaired.