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Spatial Extent of Data

USGS Data Source

USGS Thesaurus Keywords

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

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 1991-2001

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 studied during the first decade of the NAWQA Program, from 1991-2001 ("cycle 1").

Get Data and Metadata
Author(s) United States Geological orcid
Publication Date 2006-01-31
Beginning Date of Data 2001
Ending Date of Data 2001
Data Contact
Integrated Modeling &Prediction Division
DOI https://doi.org/10.5066/P9JL08QN
Citation Geological, U.S., 2006, National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001: U.S. Geological Survey data release, https://doi.org/10.5066/P9JL08QN.
Metadata Contact
Water Mission Area
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