Johnson v. Monsanto Co. was the first lawsuit to proceed to trial over Monsanto's Roundup herbicide products causing cancer. The lawsuit alleged that Roundup products caused Dewayne "Lee" Johnson's non-Hodgkin lymphoma and that Monsanto failed to warn consumers that Roundup products were potentially carcinogenic.[1][2] In a landmark verdict, Monsanto's purchaser Bayer Corporation was ordered by a San Francisco jury to pay $289m in punitive damages and compensatory damages.[3][4][5][6][7] Monsanto, and after June 2018 Bayer, appealed the verdict several times.[8] The award was cut to $78 million,[9] then reduced to $21 million after appeal.[10][11]
Background
Dewayne "Lee" Johnson, the plaintiff in this case, sprayed hundreds of gallons of RoundUp over the course of his career as a school groundskeeper in Benicia, California.[12] On one occasion, one of the sprayers he was using broke and he was drenched in RoundUp.[13] In 2014 at age 42, Johnson was diagnosed with non-Hodgkin lymphoma, which he alleged at trial was caused by the herbicide exposure.[12][14] In 2017, he was given a terminal diagnosis and was told that he would only live another 6 months.[12] Due to this diagnosis, his trial was expedited.[12] Johnson still survived and attended a showing of Into the Weeds, a Canadian Broadcasting Corporation
Cancer risk assessments of glyphosate
There is limited evidence that human cancer risk might increase as a result of occupational exposure to large amounts of glyphosate, such as agricultural work, but no good evidence of such a risk from home use, such as in domestic gardening.[16] The consensus among national pesticide regulatory agencies and scientific organizations is that labeled uses of glyphosate have demonstrated no evidence of human carcinogenicity.[17] Organizations such as the Joint FAO/WHO Meeting on Pesticide Residues and the European Commission, Canadian Pest Management Regulatory Agency, and the German Federal Institute for Risk Assessment[18] have concluded that there is no evidence that glyphosate poses a carcinogenic or genotoxic risk to humans. The final assessment of the Australian Pesticides and Veterinary Medicines Authority in 2017 was that "glyphosate does not pose a carcinogenic risk to humans".[19] The EPA has evaluated the carcinogenic potential of glyphosate multiple times since 1986. In 1986, glyphosate was initially classified as Group C: "Possible Human Carcinogen", but later recommended as Group D: "Not Classifiable as to Human Carcinogenicity" due to lack of
See also
- Monsanto legal cases
- Into the Weeds – 2022 documentary film
References
- Johnson v. Monsanto Co. Justia Law, retrieved 28 October 2025^
- https://scholar.google.com/scholar_case?case=12030781083736204276 20 July 2020^
- Monsanto ordered to pay $289m as jury rules weedkiller caused man's cancer the Guardian, August 11, 2018