Data Catalog

• Federal

  EnviroAtlas - Watershed Index Online Water Mask for the Conterminous United States

  U.S. Environmental Protection Agency —

  This data layer represents all surface water features in the United States. This grid was created by combining water features identified in two sources, the 2019...

  • Esri REST
  • HTML
  • HTML
• 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...

  • Esri REST
  • HTML
  • HTML
• Federal

  EnviroAtlas - Watershed Index Online Riparian Zone Mask for the Conterminous United States

  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...

  • Esri REST
  • HTML
  • HTML
• Federal

  San Francisco Bay Water Quality Improvement Fund County Polygons, California, 2007, Tele Atlas

  U.S. Environmental Protection Agency —

  This layer contains 58 polygon features representing California counties clipped from the national Tele Atlas county dataset. Dynamap(R)/2000 County Boundary file...

  • Esri REST
  • HTML
  • HTML

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