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

These datasets consist of a workspace (folder) containing a collection of gridded datasets plus a personal geodatabase containing several vector datasets. These datasets are designed to be used...

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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. This file (SWSUB8) is a statewide digital watershed file. It depicts the State with 138 separate...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2021-07-30T00:00:00.000+00:00

This dataset shows the percentage of each Watershed Boundary Dataset (WBD) 12-digit Hydrologic Unit (HUC) that is included in the USGS National Gap Analysis Program (GAP) or International Union...

• Organization: U.S. Environmental Protection Agency
• Updated: 2019-08-01T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area that is classified as natural, forest, wetland, agricultural, natural, and developed land cover using the EnviroAtlas composite of...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-05-07T00:00:00.000+00:00

This EnviroAtlas dataset is a summary of the National Dams Inventory data from 2009 survey. The file contains counts of inventoried dams by 12-digit hydrologic units codes (March 2011) and total...

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

These datasets each consist of a workspace (folder) containing a collection of gridded datasets plus a personal geodatabase containing several vector datasets. These datasets are designed to be...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2021-07-30T00:00:00.000+00:00

This dataset shows the percentage of each National Hydrography Dataset Plus (NHDPlus) V2 12-digit Hydrologic Unit (HUC) that is included in the USGS National Gap Analysis Program (GAP) or...

• Organization: U.S. Environmental Protection Agency
• Updated: 2018-01-24T00:00:00.000+00:00

This EnviroAtlas dataset estimates population by 12-digit HUC. It is based on the EnviroAtlas dasymetric dataset, which intelligently reallocates 2010 population from census blocks to 30 meter...

• Organization: U.S. Environmental Protection Agency
• Updated: 2020-06-01T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area within each 12-digit hydrologic unit code (HUC) in Hawaii that is classified as tree canopy using the National Land Cover Database...

• Organization: U.S. Environmental Protection Agency
• Updated: 2020-10-01T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area that is classified as tree canopy cover using the National Land Cover Database 2016 USFS Tree Canopy Cover dataset for each 12-digit...

• Organization: U.S. Environmental Protection Agency
• Updated: 2020-05-28T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area that is classified as natural, forest, wetland, agricultural, natural, and developed land cover as well as those labeled tundra,...

• Organization: U.S. Environmental Protection Agency
• Updated: 2023-04-12T00:00:00.000+00:00

This EnviroAtlas dataset depicts the total waterbody area by 12-digit HUC for the Conterminous US from the US Geological Survey's high-resolution National Hydrography Dataset (NHD). This dataset...

• Organization: U.S. Environmental Protection Agency
• Updated: 2020-10-29T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area that is classified as forest, forest including woody wetlands, and natural land cover that occurs within 45 meters of streams,...

• Organization: U.S. Environmental Protection Agency
• Updated: 2016-06-13T00:00:00.000+00:00

This EnviroAtlas dataset portrays the total number of historic places located within each 12-digit Hydrologic Unit (HUC). The historic places data were compiled from the National Park Service's...

• Organization: U.S. Environmental Protection Agency
• Updated: 2019-08-01T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage land area that is classified as forest (excluding wetlands), forest including woody wetlands, and natural land cover that occurs within 45 meters...

• Organization: U.S. Environmental Protection Agency
• Updated: 2017-06-01T00:00:00.000+00:00

This EnviroAtlas dataset estimates the average agricultural buffer width, the percentage of agricultural lands with flow paths that would intersect natural land cover before reaching a stream, and...

• Organization: U.S. Environmental Protection Agency
• Updated: 2017-03-20T00:00:00.000+00:00

This EnviroAtlas dataset is a summary of the thermoelectric water consumption based on the December 2016 US Energy Information Administration (EIA) monthly electric generator inventory, a 2014...

• Organization: U.S. Environmental Protection Agency
• Updated: 2022-03-25T00:00:00.000+00:00

This EnviroAtlas dataset represents the percentage of land area within each 12-digit hydrologic unit code (HUC) in the conterminous United State that is impervious to water infiltration using the...

• 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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