The National Water Quality Inventory Report to Congress (305(b) report) and EPA's associated electronic reporting database, ATTAINS, are the primary vehicles for informing Congress and the public about general water quality conditions in the United States. Together, this document and database characterize our water quality and identify widespread water quality problems of national significance. The most current, regularly updated state water quality information is available in EPA's ATTAINS database.

• Water Quality Reporting Database (ATTAINS): This database displays the most current available information provided by the states in their biennial integrated water quality assessment reports prepared under sections 305(b) and 303(d) of the Clean Water Act.

• 2004 Water Quality Report to Congress
  
  

• 2002 National Assessment Database: This database summarizes information provided by the states in 2002 under Section 305(b) of the Clean Water Act.

• 2002 Water Quality Report to Congress
  
  
• 2000 Water Quality Report
  
  
• 1998 Water Quality Report to Congress
  
  
• 1996 Water Quality Report to Congress
  
  
• 1994 Water Quality Report to Congress
  
  
• 1992 Water Quality Report to Congress - Executive Summary (PDF)(38 pp, 282K, About PDF)

Related Links

• Consolidated Assessment and Listing Methodology
  
  
• 305(b) Report Guidelines
  
  
• Knowing our Waters: Tribal Reporting Under 305(b) (PDF) (12 pp, 239K, About PDF)