American Council on Alcohol Problems (ACAP) is a nonprofit organization that warns the public of the dangers of alcohol. It also works to deal with the problems caused by alcohol. The organization was founded as the American Anti-Saloon League in Washington, D.C., in 1895. The name was changed to National Temperance League during the 1930's. The group took its present name in 1964. Headquarters of the American Council on Alcohol Problems are located in Bridgeton, Missouri.