Photo by Elvert Barnes

You might survive the annoying trip out to Dulles International Airport, but your health will be put at risk by smokers inside the airport once you’re there.

The Centers for Disease Control released a new report today in which it said that airports with designated smoking areas—like Dulles—pose a threat to the health of passengers and workers, reports USA Today:

The CDC, in its first study comparing air quality at airports with and without smoke-fee policies, finds pollution levels adjacent (within a meter or 39 inches) to smoking areas five times higher than levels at airports that entirely ban smoking. Levels inside smoking areas, including bars and restaurants, were 23 times higher than at smoke-free airports.

“Significant secondhand smoke exposure is going on. …These are unnecessary dangers for airport employees and passengers,” says Tim McAfee, director of CDC’s Office on Smoking and Health. He says the report shows smoking areas are not ventilated enough, adding that a ban on all indoor smoking is the “only effective protection” against secondhand smoke.

Dulles is one of the five large national airports called out in the report; Hartsfield-Jackson Atlanta International Airport, McCarran International Airport in Las Vegas, Denver International Airport, and Salt Lake City International Airport also have smoking lounges or areas.

Smoking at Dulles is only allowed at four designated lounges near gates B38, B75, C4, and D30. If you find yourself leaving from any of those, well, hold your breath. National Airport and BWI both ban smoking in indoor areas.