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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 - Agricultural Water Demand by 12-Digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
The national agricultural water demand metric provides insight into the amount of water used for agricultural irrigation in the contiguous United States. The... -
Federal
EnviroAtlas - Percent Agriculture on Hydric Soil for the Conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas dataset contains data on Agricultural Land Coverage on Hydric Soils for each Watershed Boundary Dataset (WBD) 12-Digit Hydrologic Unit Code (HUC-12)... -
Federal
EnviroAtlas - Annual average potential wind energy resource by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas dataset shows the annual average potential wind energy resource in kilowatt hours per square meter per day for each 12-digit Hydrologic Unit (HUC).... -
Federal
EnviroAtlas - Cultivated biological nitrogen fixation in agricultural lands by 12-digit HUC in the Conterminous United States, 2006
U.S. Environmental Protection Agency —
This EnviroAtlas dataset contains data on the mean cultivated biological nitrogen fixation (C-BNF) in cultivated crop and hay/pasture lands per 12-digit Hydrologic... -
Federal
EnviroAtlas - National Inventory of Dams by 12-digit HUC for the Conterminous United States
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...