The Midwest Sterilization lawsuits are personal injury and wrongful death claims brought by people who allege that ethylene oxide emissions from the company’s plants in Jackson, Missouri, and Laredo, Texas, caused their cancers. Midwest Sterilization Corporation, founded in 1984 and based in Jackson, describes itself as the largest privately owned contract ethylene oxide medical sterilization company in the United States.1Robert King Law Firm. Midwest Sterilization Ethylene Oxide Lawsuit The claims are individual tort actions, not a class action, and they draw heavily on federal air-toxics findings that flagged both plants as significant sources of a chemical the EPA now classifies as a known human carcinogen by inhalation.
Who Can File a Claim
To bring a case, a plaintiff generally needs to show three things: they lived or worked within several miles of the Jackson or Laredo facility for at least one continuous year, they were later diagnosed with a cancer linked to ethylene oxide, and they file within their state’s deadline. Qualifying diagnoses include breast cancer, non-Hodgkin lymphoma, myeloma, and leukemia.2Lawsuit Tracker. Ethylene Oxide Lawsuit
Deadlines differ sharply by state. Missouri applies a five-year statute of limitations. Texas applies a two-year window that runs from the date of discovery.1Robert King Law Firm. Midwest Sterilization Ethylene Oxide Lawsuit Because Texas ties the clock to discovery rather than exposure, a recent diagnosis can revive what might look like an old exposure claim; the same diagnosis in Missouri sits under a longer but fixed window. Wrongful death claims can be filed by surviving family members when the person exposed has died from a qualifying cancer.
What the Plants Emitted
The evidence in these cases starts with the EPA’s 2018 National Air Toxics Assessment, a screening analysis of 2014 emissions data. The assessment flagged Midwest Sterilization’s Jackson plant as emitting 3.5 tons of ethylene oxide per year and placed a surrounding census tract in Cape Girardeau County, home to about 6,908 people, among 117 tracts nationwide where estimated lifetime cancer risk exceeded the EPA’s threshold of 100 in one million.3SC&A, Inc. Communities at Risk From Air Toxics Later EPA modeling found that in the most affected areas near the Jackson plant, lifetime cancer risk reached as high as 2,000 in one million, roughly one additional cancer case for every 500 people exposed continuously over 70 years.4Environmental Litigation Group. Midwest Sterilization Corporation – Jackson
The Laredo plant, which opened in 2005, released more ethylene oxide between 2014 and 2018 than any other sterilizer facility that reported to the EPA.5Texas A&M University. Regulation of Toxic Air Pollutant Emissions in Laredo Stalls The agency estimated the plant elevated lifetime cancer risk for nearly half of Laredo’s residents, including more than 37,000 children, to at least one in 100,000. Julia Bird Jones Muller Elementary School sits in an area where the estimated lifetime risk was roughly one in 3,700, nearly three times what the EPA considers acceptable.6Texas Tribune. Laredo, Texas Ethylene Oxide A 2024 air quality study conducted by University of Massachusetts Amherst scientist Richard Peltier for the Rio Grande International Study Center confirmed “particularly elevated concentrations” of ethylene oxide near the plant and identified the facility as the primary source.7KGNS. City Council Reviews Findings on Ethylene Oxide Emissions in Laredo
In October 2019, Midwest Sterilization voluntarily installed acid scrubber systems on the sterilization chamber vents at its Jackson plant, reducing emissions from those vents by more than 99 percent. Annual emissions dropped from about 5,767 pounds to about 1,215 pounds.8The Cash-Book. Midwest Sterilization Goes Above and Beyond to Avoid Air Contamination The pre-2019 emission levels remain central to plaintiffs’ theories of long-term exposure. The federal government has ordered Midwest Sterilization to submit a plan to curb emissions at Laredo, which is not in compliance with newer EPA rules requiring a 90 percent reduction.1Robert King Law Firm. Midwest Sterilization Ethylene Oxide Lawsuit
The company has said its reported emissions represent worst-case scenarios rather than actual daily levels and that it meets or exceeds all applicable regulatory standards. TCEQ records show the Laredo facility holds a “satisfactory” compliance classification.9TCEQ. Midwest Sterilization Corporation Permit Renewal
Where the Cases Stand
As of mid-2026, the cases against Midwest Sterilization are in various stages of litigation. No public settlements or jury verdicts specific to the company have been reported. Plaintiffs are pursuing individual claims rather than a certified class, an approach reinforced by a January 2026 ruling in a related ethylene oxide case against B. Braun in Pennsylvania, where a judge denied class certification and required each plaintiff to litigate separately.2Lawsuit Tracker. Ethylene Oxide Lawsuit
What Ethylene Oxide Cases Have Paid Elsewhere
Because Midwest Sterilization has no reported resolutions of its own, plaintiffs and defense counsel look at outcomes in cases against other sterilizers for reference. The largest have involved Sterigenics, a Sotera Health subsidiary that operated a plant in Willowbrook, Illinois.
In September 2022, a Cook County jury awarded $363 million to Susan Kamuda, a 70-year-old breast cancer survivor who alleged that ethylene oxide from the Willowbrook plant caused her disease. The award included $38 million in compensatory damages and $325 million in punitive damages.10Upper Michigan’s Source. Jury Awards $363 Million to Breast Cancer Survivor Who Sued Nearby Company11Medical Device and Diagnostic Industry Online. Sterigenics Slapped With $363M Jury Verdict In January 2023, Sterigenics agreed to pay $408 million to resolve more than 870 pending Illinois lawsuits without admitting liability.12Reuters. Sotera Health to Pay $408 Mln to Settle Lawsuits Over Sterilizing Chemical In October 2023, the company settled 79 Georgia claims for $35 million. In March 2025, Isomedix, a Steris subsidiary, agreed to pay up to $48.15 million to resolve claims tied to its Waukegan, Illinois, facility.13Medical Design and Outsourcing. Steris Isomedix Settles Ethylene Oxide Lawsuits in Illinois
Estimated individual settlement values in ethylene oxide cases generally run from $175,000 to $500,000, though trial verdicts have gone much higher. A personal injury trial in May 2025 produced a $20 million award.2Lawsuit Tracker. Ethylene Oxide Lawsuit These figures come from other defendants and other facilities, and they do not predict what any Midwest Sterilization case will produce.
The Regulatory Backdrop
Federal rules for the industry are in flux, and the direction matters for the lawsuits because plaintiffs rely on EPA findings to establish that emissions posed an unreasonable risk. In April 2024, the EPA finalized a rule under Section 112 of the Clean Air Act requiring commercial sterilizers to cut ethylene oxide emissions by 90 percent by 2027 and install continuous monitoring by April 2026. It was the first major update to the 1994 standards and covered fugitive emissions from aeration rooms and similar sources that earlier rules had ignored.14Harvard Law School Environmental and Energy Law Program. Ethylene Oxide Emissions Standards for Commercial Sterilization Facilities
In June 2025, the Trump administration exempted over 40 percent of U.S. sterilization facilities from the 2024 rule for two years, and on July 17, 2025, Proclamation 10959 formalized a two-year compliance extension for specific facilities on national security grounds tied to sterile medical equipment supply. Midwest Sterilization was not listed in the annex of covered facilities.15The White House. Regulatory Relief for Certain Stationary Sources to Promote American Security With Respect to Sterile Medical Equipment
On March 13, 2026, the EPA proposed rescinding several of the 2024 standards. The agency’s own analysis indicated the rollback would expose at least 85,000 additional people to unacceptable cancer risk compared with the 2024 rule.16Earthjustice. EPA Bows to Corporate Polluters, Abandons Duty to Protect Public From Sterilizers’ Ethylene Oxide Emissions The public comment period closed in May 2026, and as of mid-2026, no final decision has been announced.17Environmental Protection Network. EPN Comments on EtO NESHAP Reconsideration None of these regulatory changes create a personal claim on their own; they shape the evidence and expert testimony that lawsuits like those against Midwest Sterilization will rely on.