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    Federal
Concentrated Animal Feeding Operations (CAFOs) per County Downloadable Package, US, 2013, US EPA
U.S. Environmental Protection Agency —
This downloadable data package contains the following map layer: An ESRI polygon layer which depicts the boundaries of each US county. It has been joined with a US... - 
  
    Federal
Concentrated Animal Feeding Operations (CAFOs) per County, US, 2013, US EPA
U.S. Environmental Protection Agency —
This downloadable data package contains the following map layer: An ESRI polygon layer which depicts the boundaries of each US county. It has been joined with a US... - 
  
    Federal
EnviroAtlas - Phosphorus application as manure for 2012 by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas national map displays the application rate of phosphorus (P) as manure on croplands in the conterminous United States (excluding Hawaii and Alaska)... - 
  
    Federal
Potential contaminant sources and other landscape variables summarized for NHDPlus Version 2.1 catchments within the Chesapeake Bay Watershed (ver. 2.0, June 2021)
Department of the Interior —
This dataset consists of 262 variables which describe various known and suspected point and non-point sources of contaminants and endocrine disrupting compounds...