2 0 2 5
Cost of Clean Water Index $576
$1,122 $614
$868
$435 $577 $773
$499
110 Million
UTILITY RESPONDENTS
$648
AVERAGE NATIONAL ANNUAL SEWER SERVICE CHARGE
4.4%
INCREASE IN SEWER CHARGES 2024-2025
2.6%
$665
Regional Average Annual Charges, 2025
POPULATION SERVED
171
$800
All Respondents
Average Charge for Wastewater Services Increased 4.4% in 2025 NACWA’s Cost of Clean Water Index for calendar year 2025 indicates that the average cost of wastewater services rose 4.4 percent. The average increase was 1.8 percentage points above the rate of inflation as measured by the Consumer Price Index (CPI) (see Annual Change in Cost of Clean Water Index vs. Inflation chart). The increase was also the highest one-year increase in wastewater charges reported since 2013. In 2025, the national average amount that a single-family residence paid for wastewater services was $648. Wastewater service charges vary widely among EPA regions and states, and are affected by demographics, geography, system age, regulatory requirements, and a range of other issues. To illustrate these variations, the Regional Average Annual Charge map shows a breakdown of average charges by EPA region. The average service charge by Region varies from a low of $435 in EPA Region 8 to a high of $1,122 in EPA Region 1.
INCREASE IN CONSUMER PRICE INDEX 2024-2025
2 0 2 5 C O S T O F C L E A N WAT E R I N D E X | T H E N AT I O N A L A S S O C I AT I O N O F C L E A N WAT E R A G E N C I E S