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    Federal
NCCOS Long-term Monitoring Project: Regional Ecological Assessments and National Benthic Inventory
National Oceanic and Atmospheric Administration, Department of Commerce —
NOAA's National Centers for Coastal Ocean Science (NCCOS) works in partnership with other federal agencies and coastal states to conduct assessments of ecological... - 
  
    Federal
National Wildlife Refuge System Fishing and Hunting Opportunities
Department of the Interior —
In accordance with the Federal Duck Stamp Act of 2014 (Pub. L. 113-264), which amended the Duck Stamp Act, all amounts in excess of $15 received from the sale of each... - 
  
    Federal
Extreme Water Levels from CO-OPS
National Oceanic and Atmospheric Administration, Department of Commerce —
Extremely high or low water levels at coastal locations are an important public concern and a factor in coastal hazard assessment, navigational safety, and ecosystem... - 
  
    Federal
EnviroAtlas - 2019 Land Cover Proportions 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 natural, forest, wetland, agricultural, and developed land cover using the 2019... - 
  
    Federal
TIGER/Line Shapefile, 2023, State, Delaware, Primary and Secondary Roads
U.S. Census Bureau, Department of Commerce —
The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master... - 
  
    Federal
ESI GIS Data and PDF Maps: Environmental Sensitivity Index including GIS Data and Maps (for the U.S. Shorelines, including Alaska, Hawaii, and Puerto Rico)
National Oceanic and Atmospheric Administration, Department of Commerce —
Environmental Sensitivity Index (ESI) maps are an integral component in oil-spill contingency planning and assessment. They serve as a source of information in the... - 
  
    Federal
GAP/LANDFIRE National Terrestrial Ecosystems 2011 NGDA
Department of the Interior —
The GAP/LANDFIRE National Terrestrial Ecosystems represents a highly thematically detailed land cover map of the U.S. The GAP/LANDFIRE National Terrestrial Ecosystems... - 
  
    Federal
EnviroAtlas - 2015 EPA Discharge Monitoring Report Watershed Statistics by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas dataset includes a number of Discharge Monitoring Report (DMR) metrics summarized by watershed for a given year (https://echo.epa.gov/help/loading-... - 
  
    Federal
EnviroAtlas - MSPA connectivity with water as missing and 3-pixel edge width for the conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas dataset categorizes land cover into structural elements (e.g. core, edge, connector, etc.). It depicts core areas of natural land cover, core... - 
  
    Federal
EnviroAtlas - Watershed Index Online Hydrologically Connected Zone Mask for the Conterminous United States
U.S. Environmental Protection Agency —
The Hydrologically Connected Zone (HCZ) Mask was determined using grid analysis to combine surface water features in the United States from three datasets: First, the... - 
  
    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
Delaware Bay Upper Shelf Bottom Sediments 2008-2010
National Oceanic and Atmospheric Administration, Department of Commerce —
The Coastal Program of Delaware's Division of Soil and Water conservation (DNREC), the University of Delaware, Partnership for the Delaware Estuary, and the New... - 
  
    Federal
EnviroAtlas - Acres of crops that have no nearby pollinator habitat by 12-digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This dataset is a summary of crop acres without nearby pollinator habitat. Pollination habitat here is defined as trees (fruit, nut, deciduous, and evergreen). Crops... - 
  
    Federal
Enforcement and Compliance Information Center - ECIC
U.S. Environmental Protection Agency —
Enforcement and Compliance Information Center - ECIC is a repository of external policy and guidance documents, links to cases and settlements, civil and criminal... - 
  
    Federal
Inventory of water bottling facilities in the United States, 2024, and select water-use data, 1955-2023 (ver. 2.0, November 2024)
Department of the Interior —
An inventory of facilities that bottle water or other beverages containing water (including soft drinks, beer, wine, or spirits) or that manufacture ice was compiled... - 
  
    Federal
Data for Distribution of Groundwater Age in Aquifers Used for Public Supply in the Continental United States, 2004 - 2017 (Version 1.1: June 2022).
Department of the Interior —
This data release documents seven tables that contain environmental tracer data and lumped parameter model (LPM) results that are used for assessing the distribution... - 
  
    Federal
Data to support water quality modeling efforts in the Delaware River Basin: 2) River and Reservoir Observations
Department of the Interior —
This data release contains information to support water quality modeling in the Delaware River Basin (DRB). These data support both process-based and machine learning... - 
  
    Federal
EnviroAtlas - Dasymetric Population by 12-Digit HUC for the Conterminous United States
U.S. Environmental Protection Agency —
This EnviroAtlas dataset estimates population by 12-digit HUC. It is based on the EnviroAtlas dasymetric dataset, which intelligently reallocates 2010 population from... - 
  
    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
Chesapeake Bay (M130) Bathymetric Digital Elevation Model - NOAA/NOS Estuarine Bathymetry
National Oceanic and Atmospheric Administration, Department of Commerce —
A 1/3 arc-second Mean Lower Low Water bathymetric DEM of NOS hydrographic survey data in the Chesapeake Bay Estuary.