Full Breakdown
Supreme Court Weighs Roundup Liability Amid Tens of Thousands of Lawsuits
4/26/2026, 8:24:50 PM
Supreme Court Hears Roundup Liability Case
On April 27, 2026, the U.S. Supreme Court began oral arguments in *Durnell v. Bayer*, addressing whether Bayer AG—owner of Monsanto—can be sued for failing to warn that glyphosate, the active ingredient in Roundup, causes cancer. The ruling could determine the fate of tens of thousands of pending lawsuits alleging non-Hodgkin lymphoma.
Background & Context
Roundup, introduced by Monsanto in the 1970s, became the United States’ top-selling herbicide. In 2015 the WHO’s International Agency for Research on Cancer classified glyphosate as “probably carcinogenic to humans.” The EPA, however, maintains that glyphosate is safe and has never required a cancer-warning label. A 2022 federal court ordered the EPA to revisit its safety assessment, and the agency must complete a new review by Oct. 1, 2026.
Key Figures & Groups
- John Durnell – St. Louis resident diagnosed with non-Hodgkin lymphoma after decades of Roundup use; won a $1.25 million jury verdict in 2023.
- Howard Kornblue – Former Roundup user from Scottsdale, Arizona, also diagnosed with lymphoma; a plaintiff in the pending settlement.
- Bayer AG – Argues EPA approval shields it from state-level warning-label claims.
- U.S. Department of Justice – Defends Bayer’s position, citing EPA’s cost-benefit analysis.
- American Farm Bureau Federation and other agricultural groups – Warn that a ban could threaten the U.S. food supply.
- Public-health advocates – Including former EPA officials who filed an amicus brief supporting plaintiffs.
Timeline
- 1970s: Roundup developed by Monsanto.
- 2015: WHO IARC classifies glyphosate “probably carcinogenic.”
- 2022: Federal court orders EPA to redo glyphosate safety review.
- 2023: Jury awards Durnell $1.25 million.
- April 27, 2026: Supreme Court arguments commence.
- June–July 2026: Decision expected.
- Oct. 1, 2026: EPA deadline for new safety review.
Data & Statistics
- Tens of thousands of lawsuits filed nationwide.
- Potential liability estimated in the billions of dollars.
- A proposed $7.25 billion class-action settlement aims to resolve many claims.
- Approximately half of Roundup cases that reach trial have been lost, according to plaintiff attorney Christopher Seeger.
Official Statements & Responses
Bayer contends that the EPA’s determination that glyphosate does not cause cancer preempts state-level warning-label claims, insulating the company from liability. The DOJ’s filing emphasizes the agency’s cost-benefit framework, arguing that the product’s benefits in 99.99 % of uses outweigh rare injuries. Agricultural groups, represented by the American Farm Bureau Federation, warn that eliminating glyphosate could “devastate America’s food supply.” The Trump administration, via an executive order, designated glyphosate as critical to national security, reversing the Biden administration’s earlier stance.
Criticism & Opposition
Public-health organizations and former EPA officials assert that EPA-approved labels omit necessary warnings, citing the WHO classification and a retracted 2000 scientific review that had previously supported glyphosate safety. Plaintiffs’ lawyers criticize Bayer’s marketing of Roundup as safe for use in “a t-shirt and shorts,” arguing the company failed to update warnings despite emerging evidence.
On-the-Ground Reports
John Durnell, whose cancer is in remission, testified that chemotherapy left lasting mobility issues, limiting his ability to maintain his neighborhood. Howard Kornblue described his condition as “devastating,” noting that he now avoids public venues and hopes any compensation will cover medical expenses.
Conflicting Reports & Gaps
The WHO’s IARC classification of glyphosate as “probably carcinogenic” contrasts with the EPA’s position that the chemical does not cause cancer. The Supreme Court’s pending ruling will address whether EPA approval overrides state-level warning claims, but the upcoming EPA safety review remains incomplete, leaving a gap in definitive scientific assessment.
Verbatim Quotes
- “But in 2015, a World Health Organization agency said glyphosate was “probably carcinogenic to humans,” prompting lawsuits.” — WHO IARC
- “I don’t trust the Supreme Court in this situation,” — Howard Kornblue, former Roundup user
- “EPA has concluded again and again that glyphosate doesn’t cause cancer,” — DOJ filing citing EPA
- “Walmart gives a better warning to people when they have a spill of milk in the store than Monsanto's ever given to a Roundup lawn and garden buyer,” — Roe Frazer, attorney for John Durnell
- “My situation will never get better,” — Howard Kornblue, plaintiff
What’s Next
The Supreme Court is slated to issue its opinion by early July 2026. Regardless of the outcome, the EPA must complete its mandated glyphosate safety review by Oct. 1, potentially prompting regulatory changes. Plaintiffs must decide whether to accept the $7.25 billion settlement before the Court’s decision becomes final.
