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#1 Federal
Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 1991-2001
- Organization: Department of the Interior
- Dataset Last Updated: November 17, 2020 at 12:00 AM
This is a GENERALIZED version 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...
- XML
- XML
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 09:39 PM
#2 Federal
Generalized boundaries of the National Water-Quality Assessment (NAWQA) Study-Unit Investigations in the conterminous United States 2001-2012
- Organization: Department of the Interior
- Dataset Last Updated: November 17, 2020 at 12:00 AM
This is a GENERALIZED version 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...
- XML
- XML
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: October 14, 2026 at 06:33 AM

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