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Clean Watersheds Needs Survey

EPA’s Clean Watersheds Needs Survey (CWNS) is an assessment of capital investment needed nationwide for publicly-owned wastewater collection and treatment facilities to meet the water quality goals of the Clean Water Act. These capital investment needs are reported periodically to Congress.

About the CWNS

2012 CWNS Report and Data

CWNS Reports
and Data

2012 Data and
Mapping Tools

2012 CWNS Quick Facts

Total Needs: $271 billion

Secondary Wastewater Treatment: $52.4 billion
Advanced Wastewater Treatment: $49.6 billion
Conveyance System Repair: $51.2 billion
New Conveyance Systems: $44.5 billion

Combined Sewer Overflow Correction: $48.0 billion
Stormwater Management: $19.2 billion
Recycled Water Distribution: $6.1 billion

Number of POTWs: 14,691

Population Served by POTWs: 234.1 million