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  2. National Aquatic Resource Surveys

National Aquatic Resource Survey Webcasts

Learn about the National Aquatic Resource Surveys (NARS) from presentations offered as part of EPA’s Watershed Academy webcast series.

  • The Condition of U.S. Lakes and Streams: Findings from the National Aquatic Resource Surveys, March 23, 2017
  • EPA Releases the First Ever National Wetland Condition Assessment, June 16, 2016
  • EPA Releases Scientific Report Showing U.S. Coastal Waters a Mix of Good and Fair Health, Feb. 25, 2016
  • Draft National Rivers and Streams Assessment 2008-2009: A Collaborative Survey, April 3, 2013
  • National Lakes Assessment: Reporting on the Condition of the Nation's Lakes, January 5, 2010

National Aquatic Resource Surveys

  • Background
    • Indicators
    • Manuals
    • Map of Sampled Sites
  • NARS Data
    • Journal Articles
    • Applying the Data
    • LakeCat
    • StreamCat
  • National Coastal Condition Assessment
  • National Lakes Assessment
  • National Rivers and Streams Assessment
  • National Wetland Condition Assessment
  • Outreach Materials
Contact Us about National Aquatic Resource Surveys
Contact Us about National Aquatic Resource Surveys to ask a question, provide feedback, or report a problem.
Last updated on March 17, 2025
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