Mar 8, 2021 · A two-dimensional map representation of the principal aquifers of the Nation is shown below. This map, which was derived from Ground Water Atlas of the United States data (published as part of the National Atlas in 1998, revised 2003) indicates the areal extent of the uppermost principal aquifers on a national scale.

Apr 30, 2024 · Access the Interactive Map of Sole Source Aquifers National Geographic Information Systems (GIS) layer of SSAs Information on sole source aquifers (SSAs) is widely used in assessments under the National Environmental Policy Act and at the state and local level. A national layer, including all available SSA coverages, is available for use in GIS. In addition to single SSA designated area ...

The U.S. Geological Survey and the Idaho Department of Water Resources measured groundwater levels during spring 2022 and autumn 2022 to create detailed potentiometric-surface maps for the alluvial aquifer in the Big Lost River Valley in south-central Idaho. Wells were assigned to shallow, intermediate, and deep water-bearing units based on well depth, groundwater potentiometric-surface...

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The International Groundwater Resources Assessment Centre (IGRAC) hosts the Global Groundwater Information System (GGIS), an interactive set of maps with groundwater related information and knowledge. Their “global overview” map shows, at the national level: Groundwater quality and quantity Aquifer characteristics, including: Extent of sandstone, gravel, limestone, metamorphic, and ...

Mar 9, 2011 · This map layer contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands, portrayed as polygons. The map layer was developed as part of the effort to produce the maps published at 1:2,500,000 in the printed series "Ground Water Atlas of the United States".

Oct 7, 2021 · This principal aquifers map is available for download as a wall-map-sized PDF (14.4 MB), a printable PDF (1.7 MB), or available for purchase from the USGS Store. 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 wells and springs. The areal and vertical location ...

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. [1]

Interactive, searchable map showing summary of groundwater-quality results of principal aquifer network in Cycle 3 (2012–22) in the conterminous United States. Maps of arsenic and manganese are also presented in figure 16. Figure 1.4. Interactive, searchable map showing selected groundwater-quality model results in the conterminous United States.

Jul 19, 2024 · This page includes information about the location of aquifer exemptions in the United States and provides a link to an interactive map to find site-specific aquifer exemption locations.