Editing Libby, Montana (section)

=== Ground water contamination ===
A second EPA Superfund site is the Libby Ground Water Contamination site at a former lumber and plywood mill which ceased operations in 1969. The mill's disposal practices and spills contaminated the soil, surface water, and groundwater with chemicals including [[pentachlorophenol]], which the EPA discovered in nearby well water in 1979. Site reviews are held every five years, and as of 2020, several controls are in place to prevent contact with and consumption of contaminated materials.<ref>{{Cite web|title=LIBBY GROUND WATER CONTAMINATION Site Profile|url=https://cumulis.epa.gov/supercpad/SiteProfiles/index.cfm?fuseaction=second.cleanup&id=0800412|access-date=2020-12-21|website=United States Environmental Protection Agency|language=en}}</ref>