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PFAS

Per- and polyfluoroalkyl substances persist, bioaccumulate for long-chain members, and now sit under tight U.S. drinking-water MCLs measured in parts per trillion. This hub collects every PFAS guide on the site.

  1. Environmental Health

    Reducing Household Toxins: The Steps (2026)

    Dose-ranked household mitigations: water filters, fragrance cuts, mold moisture, plastics heat, dust hygiene, cookware—without detox theater.

    ELENA VOSS 14 MIN READ

  2. Women's Health

    PFAS in Pregnancy and Lactation: BP Monitoring, Milk Transfer, and Guidance

    C8 PIH probable link; ATSDR BP vigilance; most should continue breastfeeding—formula water must be PFAS-controlled.

    ELENA VOSS 6 MIN READ

  3. Environmental Health

    PFAS in NHANES: What U.S. Blood Levels Show Over Time

    Nearly everyone has detectable PFAS. Legacy compounds fell hard after phase-downs—replacements did not erase exposure.

    ELENA VOSS 4 MIN READ

  4. Men's Health

    PFAS and Men: Fertility, Semen Quality, and Testicular Cancer Risk

    C8 probable link for PFOA and testicular cancer; NASEM ≥20 ng/mL clinical prompts; semen signals heterogeneous—exposure cut first.

    ELENA VOSS 6 MIN READ

  5. Environmental Health

    PFAS in Cosmetics, Packaging, and Personal Care: Exposure Pathways

    Not only water. Grease-proof packaging, film-forming makeup, and textiles add exposure routes.

    SOFIA RAJAN 4 MIN READ

  6. Environmental Health

    PFAS and Cancer: IARC Groups, Kidney and Testicular Signals

    PFOA is Group 1. PFOS is Group 2B. Hazard is not the same as your personal risk.

    ELENA VOSS 4 MIN READ

  7. Environmental Health

    Water Filtration & Reverse Osmosis: How to Choose by Contaminant, NSF Claim & Cost

    The right filter is a claim matched to a lab result—not a marketing sticker. This guide maps microbes, metals, PFAS, nitrate, and chlorine to technologies, NSF standards, RO setup, and real maintenance.

    ELENA VOSS 12 MIN READ

  8. Environmental Health

    PFAS Removal: Reverse Osmosis vs Activated Carbon Filters

    GAC handles many long-chain PFAS until breakthrough; RO is the more consistent barrier for short- and long-chain compounds when certified and maintained.

    ELENA VOSS 6 MIN READ

  9. Environmental Health

    PFAS Forever Chemicals: Complete Guide to Exposure, Health Evidence & Mitigation

    EPA drinking-water MCLs are now 4.0 ppt for PFOA and PFOS. Here is how forever chemicals enter the body, what half-lives and biomonitoring tiers mean, and which filters actually work.

    ELENA VOSS 12 MIN READ

  10. Environmental Health

    PFAS EPA MCLs Explained: What 4.0 ppt Means for Drinking Water

    A units-first decode of EPA’s 2024 PFAS National Primary Drinking Water Regulation—MCL vs MCLG, Hazard Index math, and why 70 ppt is obsolete.

    ELENA VOSS 6 MIN READ

  11. Environmental Health

    NSF Water Filter Standards 42, 53, 58, and 401 Explained

    Certification is claim-specific and model-specific: 42 is aesthetic, 53 health adsorption, 58 reverse osmosis, 401 emerging compounds.

    ELENA VOSS 6 MIN READ

Frequently asked

About PFAS

What is a ppt?
Parts per trillion — one part in 10¹². EPA set PFOA and PFOS MCLs at 4.0 ppt, which is why ordinary carbon pitcher marketing often fails without a certified claim.
Does boiling remove PFAS?
No. Boiling does not destroy PFAS and can concentrate dissolved contaminants as water volume falls. Use certified RO or carbon systems rated for the target compounds.
Should I stop breastfeeding because of PFAS?
Public-health defaults generally favor continued breastfeeding for most people; discuss individual high-exposure cases with clinicians rather than internet detox scripts.