GIS Coverage of the National Water Quality Assessment Program: Surface Water Nutrient Sampling Sites for the EPA Clean Air Mapping and Analysis Program (C-MAP)

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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
Surface Water Nutrients for the conterminous United States, excluding the High
Plains Regional Ground-Water Study. It is intended for use with NAWQA_NU.DBF
and as an overlay with NAWQA, the NAWQA study units boundary coverage.

The National ... View entire text
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Description: GCMD metadata on the National Water Quality Assessment Program
(NAWQA). This record provides metadata on the original tabular
nonspatial data.
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Geographic Coverage
Spatial coordinates   
  N: 48.25   S: 22.87   E: -65.35   W: -127.88

Data Set Citation
Dataset Originator/Creator: Hitt, K.J. and Nakegaki, N.
Dataset Title: National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States : Surface Water Nutrient Sampling Sites
Dataset Release Date: 1999-07-01
Dataset Release Place: Reston, VA
Dataset Publisher: USGS
Data Presentation Form: Map
Online Resource:
Quality This data set is used primarily to display the location of NAWQA
Nutrient 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.
Access Constraints None
Data Set Progress
Originating Center
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: 20 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: 2002-11-15
Last DIF Revision Date: 2008-09-23
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