In the U.S., federal law establishes 21 as the national minimum drinking age. Underage drinking is also governed by state laws, which vary by state. In some states, it is a civil offense and in some states it is a criminal offense. As of 2005, 21 states do not specifically ban underage consumption and an additional 15 states have family member and/or location exceptions to their underage consumption laws.
Federal law has exceptions for religious, medical, employment and private club possession of alcohol by minors. Most states also have family member and/or location exceptions to their underage possession laws.
Binge drinking has become an increasing concern, especially on college campuses. Numerous studies have been conducted to prove the danger and associated costs of underage drinking.
