Short Wave

Why research into ‘forever chemicals’ includes firefighters

February 2, 2026

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  • PFAS (per and polyfluoroalkyl substances), known as 'forever chemicals' due to their persistence, are ubiquitous in consumer products like nonstick pans and stain-resistant fabrics, leading to constant human exposure. 
  • Firefighters face potentially high PFAS exposure from intentionally added chemicals in their protective gear and historically from firefighting foams, prompting research into their elevated levels. 
  • Baseline data from a U.S. firefighter study suggests that individuals who reported a history of plasma donation had significantly lower PFAS levels than those who did not, mirroring findings from Australian research. 

Segments

Introduction to PFAS Chemicals
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(00:00:22)
  • Key Takeaway: PFAS chemicals were discovered for their oil and water-repelling properties, leading to widespread industrial use since the 1940s.
  • Summary: PFAS, or per and polyfluoroalkyl substances, include over 10,000 types and were initially celebrated for making items like pans nonstick and clothes waterproof. These chemicals are hard for the body to excrete, leading to their nickname, ‘forever chemicals.’ Exposure is constant, as PFAS sheds from treated materials like carpet and furniture into the environment.
Firefighter Exposure Sources
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(00:04:07)
  • Key Takeaway: Firefighter PFAS exposure is suspected to come from protective gear and firefighting foams, with foams being a confirmed significant contributor.
  • Summary: PFAS is intentionally added to firefighter gear for its repelling properties, raising concerns that the gear itself might increase exposure. Historically, PFAS was an essential component of a common firefighting foam, and firefighters with a history of using these foams show higher PFAS levels. Researchers are still investigating the exact sources of exposure on the job.
Research Methodology and Findings
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(00:05:46)
  • Key Takeaway: The U.S. study relies primarily on extensive self-reported surveys and blood samples to measure PFAS levels in firefighters.
  • Summary: Due to the large study size (about 8,000 firefighters), researchers use extensive annual surveys and event-specific questionnaires to track behavior and exposure factors. PFAS levels are directly measured in the participants’ blood. Baseline data confirms that firefighters reporting a history of plasma donation had significantly lower PFAS levels than those who did not.
Future Recommendations and General Advice
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(00:08:17)
  • Key Takeaway: Research aims to generate best practices for firefighters, while the general public should focus on water filtration rather than excessive personal anxiety.
  • Summary: The research hopes to inform best practices, such as the Clean Cab Initiative which encourages on-scene decontamination and keeping gear out of the vehicle cab. While everyone should be concerned about PFAS, individuals should focus on meaningful steps like using water filtration, as well water filtration and bottled water were associated with lower PFAS levels. People on well water may have higher levels due to potential groundwater contamination.