The Centers for Disease Control and Prevention (CDC) predicts all states will have smoking bans in restaurants, bars and workplaces by 2020. Currently, 25 states have such comprehensive indoor smoking bans.
The CDC estimates that almost half of U.S. residents are covered by either state or local laws that prohibit smoking. However, several state have laws in place that are less restrictive, such as mandatory smoking areas or separate ventilation, which the CDC does not consider effective in eliminating exposure to secondhand smoke.
According to the Associated Press, only seven states have no statewide restrictions on indoor smoking: Indiana, Kentucky, Mississippi, South Carolina, Texas, West Virginia and Wyoming.