The National Water Quality Inventory Report to Congress (305(b) report) is the primary vehicle for informing Congress and the public about general water quality conditions in the United States. This document characterizes our water quality, identifies widespread water quality problems of national significance, and describes various programs implemented to restore and protect our waters.

• Electronic Integrated Reporting under Sections 305(b) and 303(d) (Water Quality Assessment and TMDL Information): This database, known as ATTAINS, displays information provided by the states in their biennial integrated water quality assessment reports.

• 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)