What Happened to Per- and polyfluoroalkyl substances (PFAS)?

Per- and polyfluoroalkyl substances (PFAS) represent a complex and pervasive environmental and public health challenge, stemming from their unique chemical properties and widespread historical use. The story of PFAS began in 1938 with the accidental invention of Teflon (polytetrafluoroethylene or PTFE) by DuPont, showcasing the remarkable heat, oil, stain, and water-resistant qualities of these compounds. By the 1950s, PFAS saw extensive commercial production and application in a staggering array of products, including nonstick cookware, stain-repellent fabrics, waterproof clothing, food packaging, and firefighting foams (AFFF).

The 'why it happened' is rooted in the exceptional stability of the carbon-fluorine bond, which makes PFAS highly effective in their intended applications but also renders them extremely resistant to natural degradation, earning them the moniker 'forever chemicals.' For decades, the full extent of their environmental persistence and potential health hazards was not widely understood by the public, and some manufacturers allegedly withheld or downplayed early evidence of toxicity. This led to their accumulation in soil, water, air, wildlife, and the blood of nearly all Americans and populations worldwide.

Key turning points began to emerge in the 1970s with initial studies raising alarms about environmental and health impacts, followed by detections in workers' blood in the 1990s. Public awareness significantly increased in the early 2000s, leading to pressure from the U.S. Environmental Protection Agency (EPA) for major manufacturers like 3M and DuPont to phase out certain long-chain PFAS, such as PFOA and PFOS. International conventions, like the Stockholm Convention on Persistent Organic Pollutants, also began listing these chemicals for global phase-out. The subsequent years saw a surge in scientific research linking PFAS exposure to a range of adverse health effects, including various cancers (kidney, testicular, liver), reproductive problems, weakened immunity, and developmental issues in children.

The consequences have been profound. As of January 2026, over 15,000 personal injury lawsuits related to PFAS exposure were pending in federal multidistrict litigation in the U.S., with bellwether trials expected in 2026. Major settlements have been reached, including over $12 billion from 3M, DuPont, Chemours, and Corteva for public water systems contamination, and an $875 million state environmental settlement in New Jersey in August 2025. The estimated cost of PFAS pollution in the EU alone could reach €440 billion by 2050 if current levels continue without regulatory action.

As of March 20, 2026, the current status of PFAS is characterized by an accelerated global response. At the federal level in the U.S., the EPA continues to expand its PFAS roadmap, with reporting requirements under TSCA Section 8(a)(7) opening in April 2026 for substances manufactured or imported between 2011 and 2022. The EPA also released $945 million in the past year to reduce PFAS exposure in drinking water systems. State-level regulations are moving even faster, with numerous bans and reporting requirements taking effect in 2026 across states like Colorado, Maine, Minnesota, and New York, targeting products from cleaning supplies and cookware to cosmetics and textiles. In the EU, the European Chemicals Agency (ECHA) is advancing a comprehensive restriction proposal covering over 10,000 PFAS chemicals, with the Risk Assessment Committee adopting its opinion in March 2026 and the full scientific evaluation expected by the end of 2026. New scientific studies in early 2026 continue to reveal health impacts, such as links between PFAS exposure and weakened bones in teens and accelerated biological aging. Simultaneously, significant advancements are being made in remediation, with new filtration technologies capable of removing PFAS from water up to 100 times faster than previous systems, and the development of destruction technologies gaining traction.