PFNA is a man-made chemical in the PFAS family, used in industrial processes and consumer products. It persists in the environment and can contaminate drinking water sources.

PFNA (Perfluorononanoic acid) is a long-chain PFAS chemical used in various industrial processes and consumer products. It's extremely persistent, earning the nickname "forever chemical." PFNA can enter water sources through industrial discharges, landfill leaching, or contaminated soil. Water testing typically measures PFNA in parts per trillion (ppt). While health effects are still being studied, concerns exist about its potential impact on liver and immune function. Efforts are ongoing to regulate and reduce PFNA in drinking water.