The following list includes states and municipalities with laws currently in effect that regulate where use of
electronic cigarettes (e-cigarettes) is prohibited. E-cigarettes are battery-powered devices that are designed to
mimic cigarettes by vaporizing a nicotine-laced liquid that is inhaled by the user. The use of e-cigarettes in
workplaces and public places is a significant public health concern, not only because of their unregulated
constituents and the potential health impact of the vapor on users and bystanders, but also because e-cigarette
use causes public confusion as to where smoking is allowed, resulting in compliance problems with smokefree
laws.