Pfhpa is a synthetic chemical in the PFAS family, used in firefighting foams and industrial processes. It persists in the environment and accumulates in the human body over time.

Pfhpa, like other PFAS chemicals, enters water sources through industrial discharges, firefighting activities, and landfill leachate. It's highly resistant to breakdown, earning the nickname "forever chemical." Pfhpa can be found near manufacturing sites, airports, and military bases where firefighting foams were used. Water testing for Pfhpa is typically done in parts per trillion (ppt). As an emerging contaminant, research on its specific health effects is ongoing, but it shares concerns with other PFAS compounds.