Subtopics
Baker
Benton
Clackamas
Clatsop
Columbia
Coos
Crook
Curry
Deschutes
Douglas
Gilliam
Grant
Harney
Hood River
Jackson
Jefferson
Josephine
Klamath
Lake
Lane
Lincoln
Linn
Malheur
Marion
Morrow
Multnomah
Polk
Sherman
Tillamook
Umatilla
Union
Wallowa
Wasco
Washington
Wheeler
Yamhill

See also
Adel
Alturas
Baker
Basin and Range basin-fill aquifers
Bend
Black Rock Desert-Humboldt
Boise
Burns
Canyon City
Columbia Plateau basaltic-rock aquifers
Columbia Plateau basin-fill aquifers
Coos Bay
Copalis Beach
Crescent
Eureka
Grangeville
Hoquiam
Jordan Valley
Klamath Falls
Klamath-Northern California Coastal
Lower Columbia
Lower Snake
Mcdermitt
Medford
Middle Columbia
Middle Snake
Oregon closed basins
Oregon-Washington Coastal
Pacific Northwest basaltic-rock aquifers
Pacific Northwest basin-fill aquifers
Pendleton
Pullman
Roseburg
Sacramento
Salem
Snake River Plain basaltic-rock aquifers
Snake River Plain basin-fill aquifers
The Dalles
Vancouver
Vya
Walla Walla
Weed
Willamette
Willamette Lowland basin-fill aquifers