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Federal
EnviroAtlas - Estimated floodplain map for the Conterminous United States recent views
U.S. Environmental Protection Agency —
Understanding the relationship between flood inundation and floodplains is critical for ecosystem and community health and well-being, as well as targeting floodplain... -
Federal
EnviroAtlas - Average annual soil loss and sediment yield to waterbodies by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas national dataset shows the average annual soil loss and sediment yield to waterbodies by 12-digit HUC subwatershed for the conterminous United States... -
Federal
EnviroAtlas - 2002 Edge-of-Field Simulated Nitrogen, Phosphorus and Water Quantity Loss by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset contains annual (2002) simulated estimations of edge-of-field agricultural nitrogen (N) and phosphorus (P) lost in surface runoff, subsurface... -
Federal
EnviroAtlas - 303(d) Impairments by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset depicts the total length of stream or river flowlines that have impairments submitted to the EPA by states under section 303(d) of the Clean... -
Federal
EnviroAtlas - 2016 Floodplain Land Cover Proportions for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset represents the percentage of land area in estimated floodplains that is classified as natural, forest, shrubland, wetland, developed, low... -
Federal
EnviroAtlas - 2011 Agricultural Land Cover on Steep Slopes for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset represents the percentage land area that is classified as agricultural land cover that occurs on slopes above a given threshold for each... -
Federal
EnviroAtlas - Watershed Index Online Riparian Zone Mask for the Conterminous United States recent views
U.S. Environmental Protection Agency —
The Riparian Zone Mask represents surface water in the United States and its estimated riparian zone. These areas were determined using grid analysis of an... -
Federal
EnviroAtlas - Average Annual Precipitation 1981-2010 by HUC12 for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset provides the average annual precipitation by 12-digit Hydrologic Unit (HUC). The values were estimated from maps produced by the PRISM... -
Federal
EnviroAtlas - Road Density Metrics by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset describes several metrics related to road-stream crossings and roads near streams at the watershed scale. According to EPA report... -
Federal
EnviroAtlas - Water Balance and Surficial Groundwater by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset summarizes several U.S. Geological Survey (USGS) water budget and surficial groundwater datasets by 12-digit HUC. It includes average rates... -
Federal
EnviroAtlas - Non-Native Freshwater Aquatic Biodiversity by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset describes the non-native freshwater aquatic diversity by 12-digit HUC (subwatershed) for the conterminous United States. It includes animals... -
Federal
EnviroAtlas - 2019 Percent Impervious Cover by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas -- Cyanobacteria Index for the Continental United States recent views
U.S. Environmental Protection Agency —
This dataset shows the temporal frequency and spatial extent of cyanobacteria cells in large, freshwater lakes and reservoirs across the continental United States... -
Federal
EnviroAtlas - Native Freshwater Aquatic Biodiversity by 12-digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset describes the native freshwater aquatic biodiversity by 12-digit HUC (subwatershed) for the conterminous United States. It includes... -
Federal
EnviroAtlas - HU12_polygon recent views
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas - National Inventory of Dams for the Conterminous United States recent views
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas - Percentage of stream and water body shoreline lengths within 30 meters of >= 5% or >= 15% impervious cover by 12-Digit HUC for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset shows the percentages of stream and water body shoreline lengths within 30 meters of impervious cover by 12-digit Hydrologic Unit (HUC)... -
Federal
EnviroAtlas - 2011 Land Cover, Impervious Surface, and Riparian Land Cover Proportions by State for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset represents land cover across a state and in riparian areas for each state in the conterminous United States for use in the Compare my Area... -
Federal
EnviroAtlas - Stream Confluence Dataset - Indicators of abiotic conditions for stream confluence catchments for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset contains information about physical characteristics, such as temperature, elevation, and precipitation, in the upstream catchments of stream... -
Federal
EnviroAtlas - Stream Confluence Dataset - Hydrologic attributes of stream confluences for the Conterminous United States recent views
U.S. Environmental Protection Agency —
This EnviroAtlas dataset contains information about hydrologic attributes of the upstream catchments and watersheds of stream confluences. Stream confluences are...