Hookah smoking is gaining popularity among high school seniors. That's according to a new study in the journal, Pediatrics.
The study says nearly one out of five used the water pipe device within the last year.
Researchers studied more than 5,500 high school seniors between 2010 and 2012.
The study also found usage was higher for those living in a big city, have highly-educated parents, or have a higher paying job.
The CDC says Hookah smoking has many of the same health risks as cigarettes.