Superfund Site: LIBBY GROUND WATER CONTAMINATION
Superfund Site Profile
The site has undergone significant additional investigation since 2009 to better understand the nature and extent of contaminants in the upper aquifer. The additional investigations are intended to inform a focused feasibility study (FFS), which will evaluate technologies that may be able to clean up contaminants in the upper aquifer. The FFS is expected in late 2018 or 2019. Following receipt of the FFS, EPA and the state will make a determination about how to address contamination in the upper aquifer in the future.
The Libby Ground Water Contamination site is located in Libby in Lincoln County, Montana. A lumber and plywood mill operated at the site between 1946 and 1969. Mill operations included treating wood with creosote, pentachlorophenol (commonly referred to as PCP) and other chemicals. Spills and disposal practices at the site contaminated soil, groundwater, surface water and sediment with hazardous chemicals. In 1979, EPA discovered PCP contamination in well water at a nearby residence. Cleanup, operation and maintenance activities and groundwater monitoring are ongoing.