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The Watershed Assessment, Tracking & Environmental Results System (WATERS) unites water quality information previously available only from several independent and unconnected databases.

EPA gathers water quality information to address public concerns such as:
  • How healthy is my watershed?
  • Can I drink the water?
  • Can I eat the fish?
  • Is it safe to swim in the water?

To answer these questions EPA must examine data from several different databases. WATERS has the power to improve program efficiency, communication, and analytical capacity by linking these databases so the information can easily be shared and combined.


  • Tools using the WATERS data in support of environmental analysis.
  • Web Services to perform complex analysis based on WATERS related data.
  • Mapping services providing access to WATERS data to support data visualization.

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