An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

1998 National Water Quality Inventory Report to Congress

This Report to Congress summarizes information reported by the states in 1998 describing the condition of their assessed waters, as required under Section 305(b) of the Clean Water Act. Report package contents:

  • Executive Summary
  • Chapter 1 - Introduction
  • Chapter 2 - Monitoring and Assessment
  • Chapter 3 - Rivers and Streams
  • Chapter 4 - Lakes, Ponds, and Reservoirs
  • Chapter 5 - Coastal Resources - Tidal Estuaries, Shoreline Waters, and Coral Reefs
  • Chapter 6 - Wetlands
  • Chapter 7 - Ground Water Quality
  • Chapter 8 - Public Health and Aquatic Life Concerns
  • Chapter 9 - Costs and Benefits of Water Quality Protection
  • Chapter 10 - Controlling Nonpoint Sources
  • Chapter 11 - State and Tribal Recommendations
  • Chapter 12 - State and Territory Summaries
  • Chapter 13 - Tribal Summaries
  • Chapter 14 - Commission Summaries
  • Appendices from the National Water Quality Inventory (Appendices from the National Water Quality Inventory (EXCEL versions)(239 K) )

Fact Sheet and Report Package Files:

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.