A Los Angeles County judge has refused to let sterilization company Sterigenics sidestep a wave of lawsuits from Maywood residents who say decades of ethylene oxide emissions from the company’s Vernon plant left them seriously ill. The decision keeps the residents’ claims very much alive and sets the stage for jury trials, with plaintiffs seeking both cash damages and court orders that could force tighter emission controls and real-time reporting to the community.
As reported by LAist, L.A. County Superior Court Judge Lawrence Riff denied Sterigenics’ motions for summary judgment after a two-day hearing. He found that the company’s expert analysis "was not sufficiently reasoned" because it did not adequately account for how emissions may have changed over multiple decades. That ruling keeps the cases from being tossed early and moves them toward trial or settlement talks.
What Residents Are Asking For
The plaintiffs - many of whom have been diagnosed with breast cancer, leukemia, non-Hodgkin lymphoma or other serious illnesses - want compensation for past and future medical bills, lost wages, funeral costs and the "fear and mental anguish" they say come with living near the plant. They are also asking the court to order stronger emission controls and require real-time public reporting of ethylene oxide levels, requests laid out in their CMBG3 complaint.
Regulatory And Health Context
Ethylene oxide is a colorless, flammable gas widely used to sterilize medical devices and is classified as a human carcinogen by international and U.S. authorities. Public health agencies such as IARC and OSHA say long-term exposure can increase the risk of blood and lymphatic cancers, while high short-term exposure can trigger headaches, nausea and breathing problems.
Regulators have been watching the Vernon operation closely. A South Coast AQMD health risk assessment identifies nearby Maywood residents as the maximally exposed receptors and points to fugitive ethylene oxide emissions as a major contributor to modeled cancer risk. The agency has required Sterigenics to submit a Risk Reduction Plan and has issued inspection reports and notices while it evaluates the company’s control measures and reporting.
Company Line And National Legal Backdrop
Sterigenics and its parent company Sotera Health stress that the Vernon facility sterilizes tens of millions of medical products each year for nearly 100 manufacturers and say they are cooperating with regulators to cut emissions. In public statements and filings, the company contends that air monitoring results in surrounding neighborhoods do not prove its emissions caused the cancers and other illnesses alleged by residents.
The Maywood cases are part of a growing stack of ethylene oxide lawsuits around the country. A recent SEC filing from Sotera Health notes that its subsidiaries face roughly 120 claims tied to the Vernon facility. The document also flags that initial Los Angeles trials are currently scheduled for January and April 2027, even as the company continues to fight and, in some jurisdictions, settle similar cases.
What Is At Stake - And What Comes Next
To prevail at trial, Maywood residents will have to convince jurors that their individual diagnoses are linked to historic exposure levels - a heavy lift that has produced mixed outcomes in other ethylene oxide cases. LAist noted that Judge Riff rejected Sterigenics’ bid for summary judgment in part because the company’s expert did not fully account for how emissions may have shifted over time, a preview of the technical battles that could play out in front of a jury.
All eyes now turn to the two trial dates penciled in for January 25 and April 15, 2027, and to whether courts or regulators push for quicker and clearer public disclosure of emission data in the meantime. Proceedings at South Coast AQMD over Sterigenics’ Risk Reduction Plan, along with any new monitoring results, will be closely watched by neighbors weighing potential health risks and by an industry tracking how authorities balance public health concerns against the need for sterilized medical supplies.
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