Greens sue Trump over medical sterilizer exemptions

By Alex Guillén | 01/28/2026 04:14 PM EST

President Donald Trump has issued exemptions from Biden-era pollution rules to several industries.

Donald Trump speaks.

Environmentalists are challenging President Donald Trump's exemption of dozens of medical sterilizers from Biden-era emissions limits. Jose Luis Magana/AP

Several environmental groups on Wednesday sued President Donald Trump for issuing exemptions from Biden-era pollution limits for medical sterilizers.

The rule was a centerpiece of the Biden administration’s environmental justice agenda because it targeted ethylene oxide, a gas used to sterilize medical devices and equipment that is also carcinogenic. Communities around commercial sterilizer plants have long complained about chronic exposure.

Background: EPA in 2024 estimated its new medical sterilizer rule (Reg. 2060-AU37) would curb ethylene oxide emissions by 90 percent. It was the first update to that regulation in 30 years.

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Last year, Administrator Lee Zeldin included the rule on a list of regulations to reconsider. EPA has not yet issued a proposed rewrite or repeal of the rule. The lawsuit includes EPA and Zeldin as co-defendants.

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