The regions, for DHS analysis purposes, are:
Region I - Cumberland County, Knox County, Lincoln County, Sagadahoc County, and York County.
Region II - Androscoggin County, Franklin County, Kennebec County, Oxford County, and Somerset County.
Region III - Penobscot County, Piscataquis County, Waldo County, Hancock County, and Washington County.
Region IV - Aroostook County
C.M.R. 10, 144, ch. 101, ch. III, 144-101-III-67, subsec. 144-101-III-67-32