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Principal Aquifers of the 48 Conterminous United States
Entry ID: USGS_aquifers_us_Version 1.0

Abstract: 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". The published maps contain base and cultural features not included in these data. This is a replacement for the July 1998 map layer called Principal Aquifers of the 48 Conterminous United States.

Purpose: These data are intended for use in publications, at a scale of 1:2,500,000 or smaller. Due to the small scale, the primary intended use is for regional and national data display and analysis, rather than specific local data analysis.
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Geographic Coverage
Spatial coordinates   
  N: 49.39   S: 24.52   E: -66.94   W: -124.76

Data Set Citation
Dataset Originator/Creator: James A. Miller
Dataset Title: Principal Aquifers of the 48 Conterminous United States
Dataset Release Date: 1998-07-01T00:00:00.000Z
Dataset Release Place: Madison, Wisconsin, USA
Dataset Publisher: U.S. Geological Survey
Version: Version 1.0
Data Presentation Form: Map
Online Resource:
Temporal Coverage
Start Date: 1998-07-01
Stop Date: 1998-07-01
Location Keywords
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Access Constraints None
Use Constraints Acknowledgment of the Ground Water Atlas of the United States and (or) the
National Atlas of the United States of America would be appreciated in products
derived from these data.
Data Set Progress
Data Center
Water Resources Maps and GIS Information, Water Resources Division, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 703-648-4000;1-800-426-9000
Email: h2oteam at
Contact Address:
USGS National Center
Water Resources Division
12201 Sunrise Valley Drive
City: Reston
Province or State: VA
Postal Code: 20192-0002
Country: USA
Distribution Media: online
Distribution Format: ARCE
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Phone: 608-238-9333
Contact Address:
505 Science Drive
City: Madison
Province or State: WI
Postal Code: 53711
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1970-01-01
Last DIF Revision Date: 2018-07-03