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Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.
Aquifers of the United States are organized by national principal aquifer codes and names assigned by the National Water Information System (NWIS). Aquifers are identified by a geohydrologic unit code (a three-digit number related to the age of the formation) followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name. [10]
The Northern Rocky Mountain Intermontane Basins aquifer system is composed largely of unconsolidated sand lying under western Montana, Idaho and a small part of Washington. [2] These shallow aquifers are not connected as a whole, body of water, but narrow glacial deposits unified by a common geologic history.
Download as PDF; Printable version; In other projects ... The following is a partial list of aquifers around the world. ... United States ...
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California aquifers, excerpted from map in Ground Water Atlas of the United States (USGS, 2000): Lavender is "other" for "rocks that generally yield less than 10 gal/min to wells"; dark green-blue (3) are the California coastal basin aquifers, bright-turquoise blue (7) is the Central Valley aquifer system, flat cobalt-blue (1) down south is Basin and Range aquifers
The aquifer system is on the Columbia Plateau, contained within the Cascades, Rocky Mountains, Okanogan Highlands, and the Blue Mountains. [1] These aquifers are bounded on the bottom by a layer of Miocene basaltic rock that can be up to 15,000 ft thick. [2] The primary aquifers in the system are shallow, and unconfined. [3]