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Scientists have identified more than 57,400 sites in the United States that can be presumed to be contaminated with toxins linked to cancer and other health problems, according to a study published on Wednesday.

The sites identified by the analysis include 49,145 industrial facilities, 4,255 wastewater treatment plants, 3,493 military sites, and 519 airports. A map of the sites is publicly available on a PFAS Project Lab website.

PFAS, an acronym for per- and polyfluoroalkyl substances, are a class of thousands of chemicals commonly used to make such things as food packaging, cookware, fabrics, paints, and fire-fighting foams. Exposures to some types of PFAS have been linked to a range of adverse human health issues, including certain types of cancer, birth defects, and reproductive issues.