National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13

This dataset and the accompanying Data Series report was created to assist in analysis
and interpretation of water-quality data provided by the U.S. Geological Survey,
National Stream Quality Accounting Network (NASQAN) and the National Monitoring Network
(NMN). The report describes the methods used to develop the geospatial data which was
primarily derived from the National Watershed Boundary Dataset (WBD12). The geospatial
data contains polygon shapefiles of basin boundaries for 33 NASQAN and 5 NMN stations. In
addition, 30 polygon shapefiles of the closed and noncontributing basins contained within
the NASQAN or NMN boundaries where applicable are included. Also included is a point
shapefile of the NASQAN and NMN gaging stations and associated basin and station attributes.
The basin boundaries included in this dataset are for those sites implemented under the
October 2007 design for the 5-years from 2008-2013 (http://water.usgs.gov/nasqan/).