• Organization: Department of the Interior
• Updated: 2026-01-26T00:00:00Z

This dataset provides monthly summaries of evapotranspiration (ET) data from OpenET v2.0 image collections for the period 2000-2024 for all National Watershed Boundary Dataset subwatersheds...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

This file contains hydrologic unit boundaries and codes for the conterminous United States along with Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. It was revised for inclusion in the...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

This data set has been superseded by huc2m. This file contains hydrologic unit boundaries and codes for the conterminous United States along with Alaska, Hawaii, Puerto Rico and the U.S. Virgin...

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• Organization: Department of the Interior
• Updated: 2020-08-21T00:00:00Z

This page contains 15 estimated quantiles for 9,203 level-12 Hydrologic Unit Code in the Southeastern United States for the decades 1950-1959, 1960-1969, 1970-1979, 1980-1989, 1990-1999, and...

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• Organization: Department of the Interior
• Updated: 2023-02-16T00:00:00Z

Using previously published (Robinson and others, 2019) no-flow fractions and L-moments of nonzero streamflow from decadal streamflow flow-duration analysis (daily mean streamflow), probability...

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• Organization: District of Columbia
• Updated: 2002-03-01T00:00:00.000Z

This dataset is a complete digital hydrologic unit boundary layer to the subwatershed (12-digit) 6th level at 1:24,000 scale. This data set consists of geo-referenced digital data and associated...

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• Organization: District of Columbia
• Updated: 2007-04-25T00:00:00.000Z

This data set consists of geo-referenced digital data and associated attributes created in accordance with the FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit...

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• Organization: District of Columbia
• Updated: 2024-09-26T16:30:04.000Z

This dataset is a digital hydrologic unit boundary layer for the District of Columbia only - to the watershed (10-digit) 6th level at 1:24,000 scale. It is a clipped version of the regional...

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• Organization: Department of the Interior
• Updated: 2023-09-07T00:00:00Z

The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal...

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• Organization: Department of the Interior
• Updated: 2025-01-03T00:00:00Z

This data release contains a crosswalk between subwatersheds (12-digit hydrologic unit codes; hereafter, HUC12s) and hydrologic regions (sometimes called "Van Metre regions"). This crosswalk...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2012-01-01T00:00:00.000+00:00

This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

The Geographic Information Retrieval and Analysis System (GIRAS) was developed in the mid 70s to put into digital form a number of data layers which were of interest to the USGS. One of these data...

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• Organization: Department of the Interior
• Updated: 2020-07-01T00:00:00Z

** Dataset containing HUC12 watershed boundaries that are within or intersect the boundary of a standard park AOA. ** The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

This dataset is the digital hydrologic unit boundary layer for the 8-digit subwatershed boundaries for the conterminous United States. This dataset is intended to be used with the following two...

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• Organization: State of Maryland
• Updated: 2025-05-05

This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. Hydrologic unit boundaries define the aerial extent of surface water drainage to a point. Hydrologic...

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• Organization: Department of the Interior
• Updated: 2020-08-12T00:00:00Z

The U.S. Geological Survey collected groundwater samples from 67 domestic wells and 1 spring used for domestic supply in Placer, El Dorado, Amador, and Calaveras Counties, California in 2016-2017....

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• Organization: Department of the Interior
• Updated: 2024-08-27T00:00:00Z

This child item provides a snapshot of the watershed boundary dataset which consists of a shapefile with 87,020 12-digit hydrologic unit codes (HUC12) for the conterminous United States retrieved...

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• Organization: Department of the Interior
• Updated: 2020-08-21T00:00:00Z

This data release contains estimated daily streamflow values for 9,203 level-12 hydrologic unit codes (HUC12) in the southeastern United States for the period 1950-2009. The files are provided in...

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• Organization: Department of the Interior
• Updated: 2024-12-09T00:00:00Z

This data release contains results from a simple monthly water budget that includes water supply and consumptive use for thermoelectric, irrigation, and public supply for 12-digit Hydrologic Unit...

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• Organization: Department of the Interior
• Updated: 2020-11-17T00:00:00Z

This data set includes 956 polygons labeled with a sensitivity-unit code that represents the sensitivity of ground water to contamination in Lawrence County, SD. This data set is a result of a...

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