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GIS Coverage of the National Water-Quality Assessment (NAWQA) Program Trace Elements Sampling Sites for the EPA Clean Air Mapping and Analysis Program (C-MAP)

Abstract: This is a point coverage of the sampling sites for the U.S. Geological Survey
National Water-Quality Assessment (NAWQA) Program Study-Unit investigations of
Trace Elements for the conterminous United States, excluding the High Plains
Regional Ground-Water Study. It is intended for use with NAWQA_TE.DBF and as an
overlay with NAWQA, the NAWQA study units boundary coverage.

The National ... View entire text
Related URL
Description: Access data from the USGS National Water Quality Assessment Data Warehouse.

Description: Homepage of the USGS National Water Quality Assessment Program (NAWQA).
Geographic Coverage
Spatial coordinates   
  N: 48.25   S: 22.97   E: -65.35   W: -127.88

Data Set Citation
Dataset Originator/Creator: Hitt, K.J. and Nakagaki, N.
Dataset Title: National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States : Trace Elements Sampling Sites
Dataset Release Place: Reston, Virginia
Dataset Publisher: USGS
Version: Not provided
Data Presentation Form: Map
Online Resource:
Temporal Coverage
Start Date: 1999-01-01
Stop Date: 1999-12-31
Location Keywords
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Quality This data set is used primarily to display the location of NAWQA Trace Element
Study Sites and for use with the NAWQA Study Unit boundaries coverage (NAWQA)
for analysis of data at the national scale. It is not recommended for either
local or regional analysis due to the small scale of most of the features.

The dataset was created from Latitude/Longitude coordinates using ArcView GIS.
A shapefile was created from lat/long coordinates and was then converted into a
coverage using ArcInfo. The coverage was re-projected into Albers for use with
other CAMD GIS coverages.
Data Set Progress
Data Center
Clean Air Markets Division, U.S. Environmental Protection Agency Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 202-564-9180
Email: camdgis at
Contact Address:
Clean Air Markets Division
1200 Pennsylvania Avenue, NW
Mail Code 6204J
City: Washington
Province or State: DC
Postal Code: 20460
Country: USA
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Distribution Media: electronic
Distribution Size: 21.0 KB
Distribution Format: ArcView shapefile
Fees: No fees
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2002-11-14
Last DIF Revision Date: 2018-07-26