EPA Proposes Loosening Cancer Gas Emission Limits

The U.S. Environmental Protection Agency (EPA) announced on Friday, March 13, 2026, a proposal to ease emissions limits for ethylene oxide, a gas primarily used for sterilizing medical equipment. This potential rollback of stricter rules, initially implemented in 2024 under the Biden administration, would impact about 90 commercial sterilization facilities across the United States. These facilities sterilize approximately 20 billion medical devices annually, including critical items such as pacemakers, syringes, and ventilators, due to ethylene oxide's effectiveness against bacteria and viruses without damaging delicate materials.

However, ethylene oxide is also a known carcinogen, with long-term exposure linked to various cancers, including leukemia and lymphoma, as well as potential neurological damage. The EPA first designated it a human carcinogen in 2016, finding it significantly more toxic than previously understood. The proposed changes aim to reduce compliance costs for companies by an estimated $43 million per year, including removing a requirement for constant emissions monitoring. This decision has drawn criticism from environmental advocates who argue it prioritizes polluters over the health of communities, many of which are low-income or minority neighborhoods located near sterilization plants.

Medical device manufacturers argue that ethylene oxide remains essential due to the lack of viable alternatives for sterilizing their products. The EPA's proposal comes after former President Donald Trump had previously exempted 40 plants from the 2024 rules. The agency is now accepting public comments on the proposal for 45 days, with a final rule expected within the next year. Environmental groups have challenged earlier exemptions in court, asserting that many facilities can meet the existing, stricter standards.