Why ‘Safe Levels’ Keep Getting Revised Downward — and What It Means for Filter Performance
The Pattern of Downward Revision in PFAS Standards The regulatory history of PFAS safe levels in drinking water exhibits a […]
Health & Science
PFAS and Immune Function: A Summary of 2023–2025 Research Findings
The Immune System as a PFAS Target Organ Among the many biological systems affected by PFAS exposure, the immune system
The PFAS Bioaccumulation Gap: Compounds That Concentrate in Tissue Despite Low Drinking Water Levels
Defining the Bioaccumulation Gap The relationship between drinking water PFAS concentration and the resulting tissue or serum burden is not
Occupational PFAS Exposure vs. Drinking Water Exposure: What the Body Burden Data Shows
Two Pathways to PFAS Body Burden PFAS body burden accumulates from multiple exposure pathways simultaneously, but the dominant route varies
Children’s PFAS Exposure and Filter Adequacy: Are Certified Filters Protecting the Most Vulnerable?
Why Children Are Disproportionately Exposed to PFAS Children receive systematically higher doses of PFAS per unit body weight than adults
PFAS Mixture Effects: Why Individual Compound Thresholds Underestimate Combined Risk
The Single-Compound Paradigm and Its Shortcomings Environmental health regulation has historically evaluated chemical risks one compound at a time. Maximum
TFA (Trifluoroacetic Acid): Toxicological Profile of the Most Persistent Short-Chain Compound
What Is TFA and Where Does It Come From? Trifluoroacetic acid (TFA) is the simplest perfluorocarboxylic acid, consisting of three
Precursor PFAS Bioactivation: What Your Body Does to Compounds Your Filter Didn’t Remove
The Precursor Problem in PFAS Risk Assessment PFAS risk assessment has historically focused on perfluoroalkyl acids (PFAAs) — the terminal
Short-Chain PFAS and Endocrine Disruption: Does Chain Length Reduce Potency?
The Chain-Length Assumption and Its Limitations When long-chain PFAS were phased out in favor of shorter alternatives, the underlying scientific