The EPA’s data on cancer risk from air pollution has gone dark

Darya Minovi was mapping pollution from medical sterilization plants across the country when many of the communities she was speaking to began asking the same question. The facilities emit ethylene oxide, a potent carcinogen, and those who lived nearby wanted to know how much the emissions were increasing their cancer risk. She turned to data compiled . The resulting maps, published in 2023 , a nonprofit where Minovi is a researcher, revealed that more than 14 million people lived in a 5-mile radius of ethylene oxide-emitting facilities. Crucially, the map highlighted 23 sterilization facilities that the EPA had found emit ethylene oxide at levels that definitively contribute to elevated cancer risk. The project helped raise awareness and was used to push the government to tighten limits on ethylene oxide emissions. But now, the cancer risk data that made Minovi’s analysis possible has quietly gone offline. After more than two decades of sharing this information with the public, the Environmental Protection Agency has omitted cancer risk estimates from its latest update to national air pollution data. The agency is continuing to release raw pollution figures, but it is no longer providing information on the additional cancer risk that the emissions cause. It has also not updated its searchable U. S. map of cancer risk from air pollution with the most recent data. The risk assessments are routinely used , as well as . Giles Clarke / The Trump administration has made it significantly more difficult to access environmental data. So far, the administration has modified or removed nearly 2,000 webpages and datasets on science, climate, and environmental topics. Last year, the EPA discontinued a tool that allowed the public to search its inventory of facilities that handle large volumes of hazardous substances . It also shut down an environmental justice screening tool known as EJScreen, which was the EPA’s flagship tool for tracking environmental hazards across the United States and mapped industrial pollution hot spots alongside demographic data, revealing which communities face the greatest health risks. And some of the agency’s webpages about pollutants, like ethylene oxide, have been modified to remove information about cancer risks and emphasize their industrial usefulness. Inyang Uwak, a research and policy director for Air Alliance Houston, a nonprofit advocacy group in Texas, said that the administration’s cuts tend to prioritize industries at the expense of public health.  “It’s unfortunate because this data is highly useful to organizations such as ours that use it,” she said, adding that scientists and policymakers also need the data to make informed decisions. “It’s a disservice to public health in general.” Left: The Environmental Protection Agency’s webpage on ethylene oxide in 2024.