This chart shows the Consumer Price Index (CPI) for utility (piped) gas service in the Western U.S., specifically in size class A cities, for the period from 1977 to October 2024. The data reflects the price trends of piped natural gas for all urban consumers in these regions. The CPI is reported in index format (not monetary values or percentages), providing insights into how the costs of utility gas services have fluctuated over time.