PFAS are in Miami's rainwater. And it is the latest evidence the synthetic "forever chemicals" — that have raised health concerns for people and wildlife — hitch a ride on the water cycle, using the complex system to circulate over greater distances.
For more than a year, FIU researchers collected and analyzed 42 rainwater samples across three different sites in Miami-Dade County. A total of 21 perfluoroalkyl and polyfluoroalkyl substances, or PFAS, were detected, including PFOS and PFOA (since phased out of production over cancer concerns), as well as the newer varieties used in manufacturing today.
While profiles of several PFAS matched back to local sources, others did not. According to the study, published in Atmospheric Pollution Research, this suggests Earth's atmosphere acts as a pathway to transport these chemicals far and wide — contributing to the worldwide pollution problem.
"PFAS are practically everywhere," said FIU Assistant Professor of Chemistry and study author Natalia Soares Quinete. "Now we're able to show the role air masses play in potentially bringing these pollutants to other places where they can impact surface water and groundwater."
