EPA Accused of Rewriting PFAS Pesticide Rules After Industry Lobbying

Environmental Protection Agency Administrator Lee Zeldin and senior agency officials personally oversaw a controversial revision to the EPA's pesticide webpage — changes that conveniently aligned with the same-day submission of an industry lobbying paper arguing against stricter regulation of "forever chemicals" in pesticides.

The revelation, contained in Freedom of Information Act documents obtained by the Center for Biological Diversity, raises serious questions about the independence of EPA's scientific decision-making and the influence of pesticide industry lobbyists on the Trump administration's regulatory agenda.

The Timing That Raised Eyebrows

On November 26, 2025, CropLife America — the pesticide industry's dominant lobbying organization — submitted a paper to the Journal of Toxicology and Regulatory Policy arguing against further regulation of PFAS (perfluoroalkyl and polyfluoroalkyl substances) in pesticides. That same day, EPA officials overhauled the agency's webpage explaining why many fluorinated pesticides would not be classified as forever chemicals.

The revised webpage removed any mention of alternative PFAS definitions used throughout the United States and internationally. Where the original page had explained that "EPA has not adopted a particular definition for its Office of Pesticide Programs," the new version presented the Office of Pollution Prevention and Toxics definition as the agency's sole recognized standard.

The CropLife America paper subsequently cited EPA's revised webpage as support in multiple places — creating what appears to be a circular validation loop where industry lobbying shapes government policy, which then gets cited back as independent authority.

Who Made the Changes

The FOIA documents reveal an unusual level of high-level involvement in what would typically be a routine webpage update. EPA Administrator Lee Zeldin personally reviewed and commented on drafts. So did Douglas Troutman, the assistant administrator for EPA's Office of Chemical Safety and Pollution Prevention; Nancy Beck, principal deputy assistant administrator; and Kyle Kunkler, deputy assistant administrator.

This concentration of political appointees on a single webpage revision struck observers as extraordinary. "To have the EPA administrator and his handlers directly involved in revising a single webpage is absolutely bonkers," said Nathan Donley, environmental health science director at the Center for Biological Diversity. "It exposes how desperately Zeldin and his industry cronies are working to hide the dangers of the ongoing parade of harmful pesticides this administration is approving."

The officials involved share extensive industry ties. Kunkler previously lobbied for the American Soybean Association. Beck and Lynn Dekleva, who also oversees chemical safety, both previously lobbied for the American Chemistry Council. Troutman, recently confirmed to lead the chemicals office, received the chemical council's endorsement.

The Definition That Makes All the Difference

Whether the five new fluorinated pesticides approved by the Trump administration qualify as PFAS depends entirely on which definition one uses — and the EPA has chosen the narrowest possible interpretation.

The widely accepted scientific definition, developed transparently by dozens of researchers and endorsed by more than 150 leading PFAS scientists, classifies substances with one or more fully fluorinated carbons as forever chemicals. By this standard, all five newly approved pesticides are PFAS.

EPA's unilateral definition, by contrast, requires two or more fully fluorinated carbons. Under this narrower standard, none of the five qualify — allowing the agency to claim it hasn't approved any forever chemical pesticides.

The distinction matters enormously for regulatory oversight. PFAS classification triggers additional scrutiny, reporting requirements, and potential restrictions. By avoiding the designation, these pesticides enter the market with less regulatory friction.

The Persistence Problem

EPA's justification for excluding single-fluorinated-carbon chemicals rests on a single study — Gaines et al, 2023 — which the agency claims shows these substances lack the persistence properties associated with forever chemicals.

However, the Center for Biological Diversity's analysis reveals a troubling circularity. The only place the Gaines study mentions the lack of persistence for single-fluorinated-carbon chemicals is when directly quoting the EPA's own response to a community petition. The agency is essentially citing its own position as evidence to support its position.

Real-world chemistry tells a different story. Carbon tetrafluoride has an estimated atmospheric half-life of 50,000 years. Scientists have been unable to accurately identify environmental half-lives for trifluoroacetic acid, trifluoromethanesulfonic acid, and bistriflimide because they are too persistent — estimated in centuries or millennia.

Most PFAS pesticides are expected to eventually degrade into trifluoroacetic acid, which then persists for centuries or longer. The forever chemical designation, in other words, may be delayed but not avoided.

Five Pesticides, One Pattern

Since taking office, the Trump administration has approved five new fluorinated pesticides: cyclobutrifluram (November 2025), trifludimoxazin (July 2026), diflufenican (July 2026), and epyrifenacil (July 2026). The EPA acknowledged in its internal cancer assessment that trifludimoxazin carries "suggestive evidence of carcinogenic potential" before approving it anyway.

These approvals have proceeded despite growing concern about PFAS contamination in agricultural soils, water supplies, and food chains. The chemicals have been approved for use on major crops including wheat, corn, and soybeans — staples of American agriculture that touch nearly every consumer.

What This Means for Texas Agriculture

For Texas farmers and ranchers, the regulatory controversy creates uncertainty in an already challenging environment. The state produces significant portions of the nation's cotton, cattle, and grain crops — all potential application sites for these newly approved pesticides.

Producers seeking to manage pest pressures now face difficult choices. The new pesticides offer effective control options for resistant weeds and crop pests, potentially improving yields and reducing losses. But the long-term environmental and health implications of widespread PFAS pesticide use remain poorly understood.

The EPA's apparent deference to industry lobbying also raises questions about what other regulatory decisions may be influenced by similar dynamics. If a webpage can be rewritten to accommodate industry preferences, what about safety thresholds, application restrictions, or enforcement priorities?

The Broader Context

This episode fits a larger pattern of the Trump EPA's approach to chemical regulation. The administration has consistently prioritized industry concerns over environmental and public health considerations, from rolling back water protections to weakening air quality standards.

The PFAS pesticide controversy reveals how these priorities manifest in practice — through the quiet revision of technical definitions that carry enormous regulatory consequences. By narrowing what qualifies as a forever chemical, the EPA can approve more pesticides while maintaining plausible deniability about forever chemical approvals.

For environmental advocates, the lesson is clear: the battlefield has shifted from congressional hearings and court cases to technical definitions and webpage revisions. The policy outcomes may be equally consequential, even if the process attracts far less public attention.

Looking Forward

The Center for Biological Diversity and other environmental organizations are challenging these approvals through administrative and legal channels. But the timeline for resolution stretches years into the future — years during which these pesticides will continue being applied to American farmland.

For now, the EPA's revised webpage stands as the agency's official position, cited by industry supporters as evidence that no forever chemical pesticides have been approved. The circular logic is complete: industry lobbying shapes policy, which then validates the lobbying that shaped it.

Whether this arrangement serves the public interest — or merely the interests of pesticide manufacturers — remains a question that Texas producers, consumers, and policymakers will need to grapple with as these chemicals enter widespread agricultural use.