While most people have trace amounts of the toxin in their systems due to rampant ground and water contamination and the use of PFAS in many common household products, firefighters who have been exposed to PFAS in firefighting foam were found in a study to have a level of PFAS stored in their bodily organs that is roughly three times higher than that of the general population. This doesn’t necessarily mean they are three times more likely to be diagnosed with cancer, but it does mean that there is an elevated risk of that outcome.