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#1 Federal
USGS Water-Quality Data for the Nation - National Water Information System (NWIS)
- Organization: Department of the Interior
- Dataset Last Updated: November 17, 2020 at 12:00 AM
The USGS compiles online access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American...
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Search relevance: 19.49 | Views last month: 9 | Catalog Last Checked: September 10, 2026 at 09:24 PM
#2 Federal
USGS Surface-Water Data for the Nation - National Water Information System (NWIS)
- Organization: Department of the Interior
- Dataset Last Updated: November 17, 2020 at 12:00 AM
The USGS compiles online access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American...
- XML
- XML
Search relevance: 17.25 | Views last month: 5 | Catalog Last Checked: September 10, 2026 at 08:18 PM

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