This collection contains materials from the Montana Department of Environmental Quality (1908-2012). This collection has been intellectually integrated into one Record Group, RS 494, to help facilitate access and reduce redundancy in the Montana Historical Society (MTHS) catalog. Please read the description carefully to determine which Subgroup (Division) or Sub-subgroup (Bureau, Program, Office) pertains to your research needs.

These records of the Montana Attorney General's Office consist of interoffice correspondence (1969-1978); general correspondence (1963-1966) arranged by correspondent and subject, including dockets and informal opinions; annual reports (1973-1977) of tax-exempt private foundations; speeches; and miscellany. (Reel-to-reel tapes transferred to Oral History)

This collection is a subgroup (Division) of the Montana Department of Environmental Quality records, RS 494. Please see the primary finding aid for more Montana Department of Environmental Quality records. These records (1908-2002) are comprised of correspondence, hearings, and subject files documenting the work of DEQ's Director's Office.

This collection is a subgroup (Division) of the Montana Department of Environmental Quality records, RS 494. Please see the primary finding aid for more Montana Department of Environmental Quality records. These records (1983-1997) include correspondence, reports, and subjects files, and mostly pertain to the cleanup of Silver Bow Creek near Butte, Montana.