A recently released study tested 259 water bottles from 11 brands sold across nine countries, including the United States, and found that 93% of those tested contained microplastic contamination.
Researcher Sherri Mason of the State University of New York at Fredonia told AFP that 65% of the plastic particles found were "fragments" of plastic, and included the plastic used to make some bottle caps.
More: 94% of U.S. tap water contaminated by plastic fibers — including from the faucets at Trump Tower More: Our trash is harming the deepest fish in the ocean "I think it is coming through the process of bottling the water," Mason told AFP.
So, is it dangerous to drink bottled water?
Researchers caution that it’s unclear what effect microplastics can have on the human body.
And, microplastics have been found in everything ranging from fish and shellfish found at the super market to tap water.
"There are connections to increases in certain kinds of cancer to lower sperm count to increases in conditions like ADHD and autism," said Mason.
"We know that they are connected to these synthetic chemicals in the environment and we know that plastics are providing kind of a means to get those chemicals into our bodies."
The World Health Organization confirmed to BBC that it is launching a review into the potential risks of drinking bottled water.
USA TODAY has reached out to the International Bottled Water Association for comment.