Subregions (HUC4) (WBD NP21 Simplified)

This map service contains GIS data for the Watershed Boundary Dataset (WBD) distributed with NHDPlus v2.1 (HUC2, HUC4, HUC6, HUC8, HUC10 and HUC12). The data has been simplified to increase display performance. The information supporting this service resides in the Reach Address Database (RAD) which is part of the Watershed Assessment, Tracking & Environmental Results System (WATERS).For complete metadata, please use refer to the full NHDPlus documentation at: http://www.horizon-systems.com/nhdplus/NHDPlusV2_home.php.

This map service contains GIS data for the Watershed Boundary Dataset (WBD) distributed with NHDPlus v2.1 (HUC2, HUC4, HUC6, HUC8, HUC10 and HUC12). The data has been simplified to increase display performance. The information supporting this service resides in the Reach Address Database (RAD) which is part of the Watershed Assessment, Tracking & Environmental Results System (WATERS).For complete metadata, please use refer to the full NHDPlus documentation at: http://www.horizon-systems.com/nhdplus/NHDPlusV2_home.php.

This map service contains GIS data for the Watershed Boundary Dataset (WBD) distributed with NHDPlus v2.1 (HUC2, HUC4, HUC6, HUC8, HUC10 and HUC12). The data has been simplified to increase display performance. The information supporting this service resides in the Reach Address Database (RAD) which is part of the Watershed Assessment, Tracking & Environmental Results System (WATERS).For complete metadata, please use refer to the full NHDPlus documentation at: http://www.horizon-systems.com/nhdplus/NHDPlusV2_home.php.

This map service contains GIS data for the Watershed Boundary Dataset (WBD) distributed with NHDPlus v2.1 (HUC2, HUC4, HUC6, HUC8, HUC10 and HUC12). The data has been simplified to increase display performance. The information supporting this service resides in the Reach Address Database (RAD) which is part of the Watershed Assessment, Tracking & Environmental Results System (WATERS).For complete metadata, please use refer to the full NHDPlus documentation at: http://www.horizon-systems.com/nhdplus/NHDPlusV2_home.php.

This map service contains GIS data for the Watershed Boundary Dataset (WBD) distributed with NHDPlus v2.1 (HUC2, HUC4, HUC6, HUC8, HUC10 and HUC12). The data has been simplified to increase display performance. The information supporting this service resides in the Reach Address Database (RAD) which is part of the Watershed Assessment, Tracking & Environmental Results System (WATERS).For complete metadata, please use refer to the full NHDPlus documentation at: http://www.horizon-systems.com/nhdplus/NHDPlusV2_home.php.

Full Metadata This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas). This web service includes layers depicting NHD Plus Version 2 hydrologic unit boundaries and labels at the Subregion (HUC-4), Subbasin (HUC-8), and Subwatershed (HUC-12) levels. EnviroAtlas allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the conterminous United States as well as detailed metrics for select communities. Additional descriptive information about each attribute in this web service can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).