7 datasets found for "Surface Hydrography"
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Federal
EnviroAtlas - 303(d) Impairments by 12-digit HUC for the Conterminous United States
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 Riparian Tree Canopy Cover by 12-digit HUC for Puerto Rico and the US Virgin Islands
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas - 2016 Riparian Land Cover Proportions by 12-Digit HUC for Alaska
U.S. Environmental Protection Agency —
This EnviroAtlas dataset represents the percentage of land area that is classified as forest, forest including woody wetlands, and natural land cover that occurs... -
Federal
EnviroAtlas - 2016 Riparian Tree Canopy Cover by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas - Waterbody area by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
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... -
Federal
EnviroAtlas - Predicted drinking water nitrate violations by 12-Digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This map displays predicted probability of a 12-digit Hydrologic Unit (HUC12) being at risk of violating the drinking water nitrate standard. Risk is defined as there... -
Federal
EnviroAtlas - 2016 Riparian Tree Canopy Cover by 12-digit HUC for Hawaii
U.S. Environmental Protection Agency —
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...
7 datasets found for "Surface Hydrography"