The Maryland Zoo in Baltimore will ban smoking on its grounds starting July 1.
The zoo says the ban applies to all tobacco products, including cigarettes, cigars, pipes, and alternative smoking products or other smoking devices, including e-cigarettes.
Smoking in the zoo's buildings was already prohibited by Maryland law.
"Providing a quality experience for our visitors is a priority for the Zoo, and exposure to second hand smoke has recently been the number one complaint," said Don Hutchinson, president and CEO of the Zoo. "Given the public smoking bans in public areas and workplaces, we have decided to establish and maintain a smoke-free environment here at the Zoo."
Visitors who want to smoke will have to leave the grounds or go to a designated smoking area outside the main gate.