NASQAN
Data

5-Year Summary Report 1996 - 2000 Program Description Methods Quality Assurance Downloadable Data Summary Graphics

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GIS Boundaries of NASQAN Watersheds

There are 2 zipped and tarred files of the watersheds sampled by the U.S. Geological Survey NASQAN between 1996-2000. The first contains a site coverage and the complex watershed coverage. The second has shape files that include both individual watersheds and a single polygon shape file of the areas above each of the sites. Both data sets include the watershed areas in Mexico and Canada and are documented.

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Water Quality Data Tables by Station*	Period of Record
Provisional Data	2003 - Present
Published Data	1996-2002
Stastical Summaries	1996-2002
* Description of Water Quality Tables

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Published data are also available for download at NWIS-web.