On June 25, 2026, the U.S. Supreme Court issued a decision negating the possibility of lawsuits against pesticide producer Monsanto Company under state failure-to-warn laws.
The United States Environmental Protection Agency has previously considered the use of glyphosate-based pesticides such as Monsanto’s Roundup and has concluded the chemical compound to be safe. The International Agency for Research on Cancer classifies glyphosate as Category 2A (probably carcinogenic to humans). This classification led to numerous lawsuits against Monsanto alleging that the product caused illnesses, and the plaintiff contended that the Company failed to warn them of potential dangers.
The current Supreme Court Case involved a plaintiff in Missouri who filed a lawsuit alleging that the Company failed to warn him of potential dangers as required by Missouri state law. The plaintiff used Roundup products for about 20 years and claimed it caused his non-Hodgkin’s lymphoma. The Supreme Court found that the Federal Insecticide, Fungicide, and Rodenticide Act (“FIRFA”) preempted any state “failure to warn claims.”
This essentially means that states are prohibited from requiring different labeling or packaging requirements than those required by FIRFA, which grants the EPA the ability to regulate the glyphosate pesticide. This decision will leave numerous potential plaintiffs without a remedy for significant illnesses and the opportunity to prove that the illnesses were caused by harmful pesticides.
To read more, visit:
https://www.scotusblog.com/2026/06/court-rules-for-roundup-maker-in-dispute-over-cancer-warnings-on-pesticide-labels/
To review the decision, visit:
https://www.supremecourt.gov/opinions/25pdf/24-1068_n7ip.pdf
