National Water Quality Inventory Report to Congress
The National Water Quality Inventory Report to Congress (305(b) report) and the Assessment and Total Maximum Daily Load Tracking and Implementation System (ATTAINS) database are the primary vehicles for informing Congress and the public about general water quality conditions in the United States. Together, this report 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 the ATTAINS database. The following versions of the Report to Congress are available:
- 2004 National Water Quality Inventory Report to Congress
- 2002 National Water Quality Inventory Report to Congress
- 2000 National Water Quality Inventory Report to Congress
- 1998 National Water Quality Inventory Report to Congress
- 1996 National Water Quality Inventory Report to Congress
- 1994 National Water Quality Inventory Report to Congress
- 1992 National Water Quality Inventory Report to Congress - Executive Summary
Related Links
- Consolidated Assessment and Listing Methodology (CALM) - A framework for states and other jurisdictions to document how they collect and use water quality data and information for environmental decision making.
- 305(b) Report Guidelines:
- For current guidelines on water quality reporting under Section 305(b) and Section 303(d), please visit Implementing Clean Water Act Section 303(d): Impaired Waters and Total Maximum Daily Loads (TMDLs).
- Guidelines for Preparation of the Comprehensive State Water Quality Assessments (305(b) Reports) and Electronic Updates (1997)
- Knowing our Waters: Tribal Reporting Under 305(b)