The following figures summarize water and wastewater rate changes, annualized rate increases, and typical water and wastewater bills based on data collected through surveys by AWWA and RFC.
Each biennial water and wastewater rate change shown indicates the average change of the 10 Ccf, 5/8” meter residential customer monthly bill only for respondents who participated in the survey year and the direct previous survey. For example, if the survey year is 2008, only data for utilities that participated in both the 2006 and 2008 survey were collected and used to derive the average biennial change in residential monthly bill for 2008.
Biennial adjustments for 2006 through 2014 from Chart 5 “Rate Trends in Survey Years” were used to derive the annualized rate increases and change in CPI from 2004 to 2014 shown here.
This figure shows the average monthly residential water and wastewater bills from all responding utilities in each survey year. These bills are associated with a usage rate of 7,480 gallons/month. General increases in the Consumer Price Index (CPI) are also presented; starting with the average of the water and wastewater bills in 1988, this level increases based on CPI changes provided by the Bureau of Labor Statistics.