Full Breakdown
Supreme Court Blocks State Failure-to-Warn Claims in Roundup Litigation
6/30/2026, 2:19:31 AM
Supreme Court Preempts State Failure-to-Warn Claims
On June 25, 2026 the Supreme Court, in a 7-2 decision (*Monsanto Co. v. Durnell*), held that the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) preempts state-law failure-to-warn claims when the EPA has not required a cancer warning on Roundup’s label. Justice Brett Kavanaugh wrote that a Missouri jury award demanding such a warning would conflict with federal uniform-labeling rules. Justice Ketanji Brown Jackson, joined by Justice Neil Gorsuch, dissented, saying state tort duties can coexist with FIFRA.
Background & Context
Roundup, a glyphosate-based herbicide sold by Monsanto (now Bayer), has faced mass-tort suits alleging cancer risk. In 2015 the IARC labeled glyphosate “probably carcinogenic,” while the EPA repeatedly found it “not likely” to cause cancer. In 2023 a Missouri jury awarded John Durnell $1.25 million for a failure-to-warn claim after 20 years of exposure.
Key Figures & Groups
Key participants are plaintiff John Durnell, Bayer AG (owner of Monsanto), the EPA, the justices who authored the majority and dissent, farmer groups such as the National Corn Growers Association, and consumer advocates George Kimbrell (Center for Food Safety) and Bill Jordan (former EPA official). Plaintiffs’ counsel includes Brent Wisner and Christopher Seeger.
Data & Statistics
About 180,000 Roundup lawsuits exist; 61,000-65,000 remain pending. Bayer has paid >$10 billion in settlements and seeks a $7.25 billion class settlement. The vote was 7-2.
Why It Matters
The ruling makes EPA-approved labels the sole standard, limiting state courts from adding warnings. Proponents cite farmer certainty; opponents warn it curtails consumer protection.
Official Statements & Responses
Bayer called the decision “good for science, farmers, and industries that depend on regulatory clarity” and said it will help contain litigation. Ohio, Texas and Florida attorneys general urged the Court to preserve claims, noting a pesticide can be misbranded despite EPA approval.
Criticism & Opposition
George Kimbrell (Center for Food Safety) called ruling “a galvanizing call to action.” Bill Jordan warned that “people deserve honest warnings about the risks.” Brent Wisner and Christopher Seeger said it “slams the courthouse door on Americans sickened by pesticides.” Cory Booker and Rep. Anna Paulina Luna introduced bills to repeal preemption clause.
Conflicting Reports & Gaps
Scientific assessments diverge: IARC calls glyphosate “probably carcinogenic,” while the EPA finds it “not likely” to cause cancer. The Court addressed only failure-to-warn claims; it is unclear how negligence or design-defect theories will fare. No data yet on the $7.25 billion settlement’s impact.
Verbatim Quotes
- “The U.S. Supreme Court decision is good for science, farmers, and industries that depend on regulatory clarity for innovation,” — Bayer spokesperson
- “When people are exposed to pesticides, they deserve honest warnings about the risks,” — Bill Jordan, former EPA official
- “The war is far from over,” — George Kimbrell, Center for Food Safety
- “FIFRA expressly preempts Durnell’s claim” — Justice Brett Kavanaugh
What’s Next
Congressional bills by Booker and Luna seek to repeal the preemption clause. Bayer continues pursuing its $7.25 billion settlement while monitoring non-failure-to-warn claims. Farmer groups will lobby for EPA oversight; consumer advocates are preparing additional lawsuits.
