by tim » Thu Dec 04, 2025 10:40 am
https://popularrationalism.substack.com ... table-pfas
From Big Chem to Your Table: PFAS Are Being Sprayed on Our Food and No One Told the Public
Take a good look at policies that fly in the face of reason and logic. Understand: You Did Not Consent to This.
They’re spraying PFAS on our food, and the public has no idea.
PFAS—per- and polyfluoroalkyl substances—are synthetic chemicals engineered to resist heat, oil, and water. Their carbon-fluorine bonds, among the strongest in chemistry, make them incredibly stable and essentially non-degradable in nature. Developed in the 1940s, PFAS found early use in industrial applications, firefighting foams, and consumer products like nonstick cookware, waterproof fabrics, and food packaging. But in recent decades, they’ve entered an entirely new arena: agriculture.
PFAS now reach food crops through four primary routes: as active ingredients in pesticides, as unlabeled co-formulants or impurities in pesticide mixtures, as leachates from fluorinated containers, and via biosolids (processed sewage sludge) applied to soil as fertilizer. Each of these vectors has been confirmed in the scientific literature. And yet, none of them are disclosed to consumers—and few are understood even by farmers themselves.
In California, the state’s comprehensive pesticide reporting system shows that more than 15 million pounds of PFAS-containing pesticides were sprayed between 2018 and 2023. These included dozens of registered active ingredients used on almonds, tomatoes, grapes, pistachios, and alfalfa—commodities that make their way into baby food, school lunches, and livestock feed. These chemicals aren’t legacy contaminants drifting in from past manufacturing; they’re new PFAS chemistries, registered and sprayed intentionally. In 2025, EPA approved two more: cyclobutrifluram and isocycloseram, which are now allowed on leafy greens, peas, citrus, cottonseed, and more. Both belong to chemical families that degrade into smaller PFAS over time.
But most pesticide users—and the public—remain unaware that PFAS are involved at all. That’s because PFAS can be present as so-called “inert” ingredients in pesticide formulations. These aren’t disclosed on product labels and are often shielded under confidential business information protections. In one study published in Journal of Hazardous Materials Letters, researchers found PFOS, a toxic and globally restricted PFAS, in six of ten common agricultural insecticides at concentrations between 3.9 and 19.2 mg/kg. Soil and plant samples taken from fields where these insecticides were used also tested positive for PFAS.
Still more PFAS reach food crops through biosolids. These are the solids left over from wastewater treatment, marketed as free or low-cost fertilizer. Because PFAS survive the treatment process intact, they concentrate in biosolids. Farmers apply them to fields unaware they are seeding the soil with persistent organic pollutants. Multiple studies—including field trials on lettuce, tomatoes, and corn—confirm that PFAS are taken up by plants from these soils. Short-chain PFAS like PFBA and PFPeA, which are highly mobile, accumulate especially in leafy tissues. Even single applications of industrially impacted biosolids can lead to measurable contamination of plants and runoff.
EPA’s biosolids regulations do not yet include enforceable limits for PFAS, though states like Maine have begun to act independently. In 2022, Maine banned all land application of biosolids after PFAS were detected in soil, groundwater, milk, and meat from affected farms.
Why does this matter? Because PFAS are toxic at vanishingly small doses and build up over time. CDC biomonitoring shows that over 97% of Americans have detectable PFAS in their blood. Studies confirm PFAS in umbilical cord blood, placenta, and breast milk, meaning exposures begin in utero and continue through infancy.
The most consistently demonstrated health effect of PFAS is immune suppression. The National Toxicology Program classifies PFOS and PFOA as presumed human immune hazards. In a landmark study published in JAMA, researchers found that children with higher blood PFAS levels had significantly reduced antibody responses to routine childhood vaccines. A 2024 follow-up in Environmental Research found that early-life exposure was associated with lower antibodies to MMR and tetanus vaccines at 18 months.
But the harms do not stop there. The C8 Science Panel, convened as part of a class-action settlement, found probable links between PFOA exposure and testicular cancer, kidney cancer, ulcerative colitis, thyroid disease, high cholesterol, and pregnancy-induced hypertension. Other studies associate PFAS with liver damage, endocrine disruption, lowered birth weight, preeclampsia, miscarriage, and altered adolescent blood pressure. These effects are not rare, nor are they confined to occupationally exposed populations. They appear at exposure levels already present in the general public.
And still, the approvals continue. In 2023, EPA adopted a narrowed definition of PFAS for regulatory purposes, excluding molecules with only a single fluorinated carbon atom—even when those degrade into terminal PFAS like trifluoroacetic acid, which contaminates rainfall, aquifers, and drinking water. This definition allows chemical manufacturers to claim their products are not PFAS while distributing substances that contribute to the same environmental and biological burden. It is, in effect, a definitional loophole designed to support continued PFAS pesticide approvals.
This is where the public must intervene. Moms Across America, a grassroots nonprofit, has taken the lead along with Friends of the Earth. Their independently funded food testing programs have documented PFAS contamination in grocery staples, fast food, and even school lunches. Their advocacy has challenged EPA policies and pesticide registrations, exposed conflicts of interest, and pushed for state-level bans and reforms. They are calling for a national ban on PFAS pesticides, strict limits or prohibitions on biosolids use in agriculture, and full public disclosure of all pesticide ingredients—including inerts.
[url]https://popularrationalism.substack.com/p/from-big-chem-to-your-table-pfas[/url]
[quote]From Big Chem to Your Table: PFAS Are Being Sprayed on Our Food and No One Told the Public
Take a good look at policies that fly in the face of reason and logic. Understand: You Did Not Consent to This.[/quote]
[quote]They’re spraying PFAS on our food, and the public has no idea.
PFAS—per- and polyfluoroalkyl substances—are synthetic chemicals engineered to resist heat, oil, and water. Their carbon-fluorine bonds, among the strongest in chemistry, make them incredibly stable and essentially non-degradable in nature. Developed in the 1940s, PFAS found early use in industrial applications, firefighting foams, and consumer products like nonstick cookware, waterproof fabrics, and food packaging. But in recent decades, they’ve entered an entirely new arena: agriculture.
PFAS now reach food crops through four primary routes: as active ingredients in pesticides, as unlabeled co-formulants or impurities in pesticide mixtures, as leachates from fluorinated containers, and via biosolids (processed sewage sludge) applied to soil as fertilizer. Each of these vectors has been confirmed in the scientific literature. And yet, none of them are disclosed to consumers—and few are understood even by farmers themselves.
In California, the state’s comprehensive pesticide reporting system shows that more than 15 million pounds of PFAS-containing pesticides were sprayed between 2018 and 2023. These included dozens of registered active ingredients used on almonds, tomatoes, grapes, pistachios, and alfalfa—commodities that make their way into baby food, school lunches, and livestock feed. These chemicals aren’t legacy contaminants drifting in from past manufacturing; they’re new PFAS chemistries, registered and sprayed intentionally. In 2025, EPA approved two more: cyclobutrifluram and isocycloseram, which are now allowed on leafy greens, peas, citrus, cottonseed, and more. Both belong to chemical families that degrade into smaller PFAS over time.
But most pesticide users—and the public—remain unaware that PFAS are involved at all. That’s because PFAS can be present as so-called “inert” ingredients in pesticide formulations. These aren’t disclosed on product labels and are often shielded under confidential business information protections. In one study published in Journal of Hazardous Materials Letters, researchers found PFOS, a toxic and globally restricted PFAS, in six of ten common agricultural insecticides at concentrations between 3.9 and 19.2 mg/kg. Soil and plant samples taken from fields where these insecticides were used also tested positive for PFAS.
Still more PFAS reach food crops through biosolids. These are the solids left over from wastewater treatment, marketed as free or low-cost fertilizer. Because PFAS survive the treatment process intact, they concentrate in biosolids. Farmers apply them to fields unaware they are seeding the soil with persistent organic pollutants. Multiple studies—including field trials on lettuce, tomatoes, and corn—confirm that PFAS are taken up by plants from these soils. Short-chain PFAS like PFBA and PFPeA, which are highly mobile, accumulate especially in leafy tissues. Even single applications of industrially impacted biosolids can lead to measurable contamination of plants and runoff.
EPA’s biosolids regulations do not yet include enforceable limits for PFAS, though states like Maine have begun to act independently. In 2022, Maine banned all land application of biosolids after PFAS were detected in soil, groundwater, milk, and meat from affected farms.
Why does this matter? Because PFAS are toxic at vanishingly small doses and build up over time. CDC biomonitoring shows that over 97% of Americans have detectable PFAS in their blood. Studies confirm PFAS in umbilical cord blood, placenta, and breast milk, meaning exposures begin in utero and continue through infancy.
The most consistently demonstrated health effect of PFAS is immune suppression. The National Toxicology Program classifies PFOS and PFOA as presumed human immune hazards. In a landmark study published in JAMA, researchers found that children with higher blood PFAS levels had significantly reduced antibody responses to routine childhood vaccines. A 2024 follow-up in Environmental Research found that early-life exposure was associated with lower antibodies to MMR and tetanus vaccines at 18 months.
But the harms do not stop there. The C8 Science Panel, convened as part of a class-action settlement, found probable links between PFOA exposure and testicular cancer, kidney cancer, ulcerative colitis, thyroid disease, high cholesterol, and pregnancy-induced hypertension. Other studies associate PFAS with liver damage, endocrine disruption, lowered birth weight, preeclampsia, miscarriage, and altered adolescent blood pressure. These effects are not rare, nor are they confined to occupationally exposed populations. They appear at exposure levels already present in the general public.
And still, the approvals continue. In 2023, EPA adopted a narrowed definition of PFAS for regulatory purposes, excluding molecules with only a single fluorinated carbon atom—even when those degrade into terminal PFAS like trifluoroacetic acid, which contaminates rainfall, aquifers, and drinking water. This definition allows chemical manufacturers to claim their products are not PFAS while distributing substances that contribute to the same environmental and biological burden. It is, in effect, a definitional loophole designed to support continued PFAS pesticide approvals.
This is where the public must intervene. Moms Across America, a grassroots nonprofit, has taken the lead along with Friends of the Earth. Their independently funded food testing programs have documented PFAS contamination in grocery staples, fast food, and even school lunches. Their advocacy has challenged EPA policies and pesticide registrations, exposed conflicts of interest, and pushed for state-level bans and reforms. They are calling for a national ban on PFAS pesticides, strict limits or prohibitions on biosolids use in agriculture, and full public disclosure of all pesticide ingredients—including inerts.
[/quote]