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Water: Clean Watersheds Needs Survey

CWNS 2008 Report to Congress

The Clean Watersheds Needs Survey (CWNS) 2008 Report to Congress (PDF) (154 pp, 12823K, About PDF) summarizes the results of EPA's 15th national survey of capital costs to address water quality or water quality related public health problems. The total wastewater and stormwater management needs for the nation are $298.1 billion as of January 1, 2008. This amount includes $192.2 billion for wastewater treatment plants, pipe repairs, and buying and installing new pipes; $63.6 billion for combined sewer overflow correction; and $42.3 billion for stormwater management. Small communities have documented needs of $22.7 billion.

In addition to the $298.1 billion in wastewater and stornwater needs, other documented needs for nonpoint source pollution prevention ($22.8 billion) and decentralized wastewater (septic) systems ($23.9 billion) are included in Appendix A of the report. An estimated $334.5 billion and $81.5 billion in needs are potentially eligible for assistance from EPA's Clean Water State Revolving Fund and Nonpoint Source Control Grant programs respectively. PDF files of individual chapters and appendices are also available. For more information about CWNS 2008 Report see:

CWNS 2008 Data 
Data and reports can be access quickly and easily through the following four options: 

Related Resources

  • Facility/Project Fact Sheet  shows CWNS data available for an individual wastewater treatment plant, collection system, stormwater management facility, decentralized wastewater management project, or nonpoint source (NPS) pollution prevention project
  • Summary Reports display selected CWNS data for chosen  geographic areas in bar graphs and pie charts
  • Detail Reports display selected CWNS data for chosen geographic areas. The output is displayed in tables which can be exported as csv files 
  • Data Download provides a downloadable Access database of all available data elements for a selected geographic area (state or nation)

Contact Us ! Office of Water

CWNS, U.S. Environmental Protection Agency, Office of Water Management (4204M), 1200 Pennsylvania Avenue, N.W., Washington, D.C.  20460

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