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Spatial Extent of Data

USGS Data Source

USGS Thesaurus Keywords

NAWQA, National Water-Quality Assessment Program, inlandWaters, Water quality, Aquifer system, Surface water, Ground water, River basin

ISO 19115 Topic Category

environment, geoscientificInformation, inlandWaters

Place Keywords

Conterminous United States

National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 2001-2012

This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States, excluding the High Plains Regional Ground-Water Study. The data set represents the areas to be studied during the second cycle of the NAWQA Program, from 2001-2012 ("cycle 2").

Get Data and Metadata
Author(s) United States Geological orcid
Publication Date 2006-01-31
Beginning Date of Data 2002
Ending Date of Data 2002
Data Contact
Kerie J. Hitt
DOI This item doesn't have a registered DOI.
Citation Check repository for data citation.
Metadata Contact
U.S. Geological Survey
Metadata Date 2020-11-17
Related Publication
Citations of these data No citations of these data are known at this time.
Access public
License http://www.usa.gov/publicdomain/label/1.0/
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Harvest Source: ScienceBase
Harvest Date: 2024-08-24T04:55:37.909Z