PFOS, a toxic chemical used in firefighting foam, has contaminated water supplies and led to lawsuits from firefighters, military personnel, and affected communities—explore its health risks, legal actions, and regulatory bans here.

PFOA, the toxic chemical at the heart of the DuPont scandal, has been linked to cancer, immune disorders, and water contamination—explore its history, legal battles, and what’s next for lawsuits and cleanup efforts.

PFHxS is a long-chain PFAS chemical known for its extreme persistence in the human body and widespread contamination from firefighting foams and industrial use—learn how it differs from other PFAS, where it's found, and what the science reveals about its serious health risks.

PFNA is a long-chain PFAS chemical found in drinking water, soil, and household dust, with links to liver damage, thyroid disruption, developmental harm, and emerging cancer risks—learn where it's found, how it impacts your health, and what the latest science reveals.