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  2. Water Data and Tools

Water Quality Exchange Watershed Summary Tool

The Water Quality Exchange (WQX) Watershed Summary shows the types of data available in the Water Quality Portal Warehouse for a selected watershed (such as metals, nutrients, or pesticides data), who has entered the data, the period of record for the data, and how much data are available.

  • Water Quality Portal Watershed Coverage

The Watershed Coverage shows summary data for 8 digit HUCs, or Hydrologic Unit Codes. An 8-digit HUC is a watershed at a certain scale. If you do not know the 8-digit HUC that you are looking for, or to find the HUC nearest to you, please refer to EPA's How's My Waterway tool.

  • How's My Waterway

NOTE: Please make sure that your browser's Pop-up Blocker is set to off in order for the Watershed Summary to function properly. To turn off the Pop-up Blocker in Internet Explorer, go to Tools in the Menu Bar. Choose "Pop-up Blocker" > "Turn Off Pop-up Blocker".

Water Data and Tools

  • Integrated Water Analysis
  • Ambient Water Quality
  • Community Financing
  • Drinking Water
  • Water Restoration
  • Water Quality Models
Contact Us About Water Data and Tools
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 23, 2025
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