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Government Listed Asbestos Contamination Sites

This map presents 28 former asbestos manufacturing sites identified by federal health officials as priority locations for community-wide evaluations of asbestos disease. These sites received approximately 80 percent of the asbestos mined at the W. R. Grace vermiculite mine in Libby, Montana from 1964 through 1990.



Source: EWG Action Fund.
Compiled from ATSDR Phase I Vermiculite Sites, National Asbestos Exposure Review.



For these 28 sites:

  • The U.S. Environmental Protection Agency (EPA) mandated further action at the site on the basis of current contamination; OR
  • The site was an exfoliation facility that processed roughly 100,000 tons or more of vermiculite from the Libby mine. Exfoliation is a process in which vermiculite ore is heated at high temperatures to expand or "pop" it. These facilities are of particular concern because exfoliation causes higher amounts of asbestos to be released than other processing methods.