Superfund Site: LIBBY ASBESTOS SITE
LIBBY, MT

Superfund Site Profile

SITE BACKGROUND

The Libby Asbestos site is located in Libby in Lincoln County, Montana. In the early 1920s, the Zonolite Company began vermiculite ore mining operations in Libby. Vermiculite from the Libby mine, bought by W.R. Grace in 1963, was contaminated with a toxic and highly friable form of asbestos called tremolite-actinolite series asbestos, often called Libby amphibole asbestos (LA). LA has been observed in air (indoor and outdoor ambient), vermiculite insulation and bulk materials, indoor dust, soil, water, animal and fish tissue and various other media in Libby. Investigation and cleanup of the site is ongoing and cleanup at portions of the site is complete.