23 01010001 Upper St. John
23 01010002 Allagash
23 01010003 Fish
23 01010004 Aroostook
23 01010005 Meduxnekeag
23 01020001 West Branch Penobscot
23 01020002 East Branch Penobscot
23 01020003 Mattawamkeag
23 01020004 Piscataquis
23 01020005 Lower Penobscot
23 01030001 Upper Kennebec
23 01030002 Dead
23 01030003 Lower Kennebec
23 01040001 Upper Androscoggin
23 01040002 Lower Androscoggin
23 01050001 St. Croix
23 01050002 Maine Coastal
23 01050003 St. George-Sheepscot
23 01060001 Presumpscot
23 01060002 Saco
23 01060003 Piscataqua-Salmon Falls