New Data Shows Grocery Prices Rise For Americans Since Iran War

[BumRushDaShow]

7. At the bottom of the link the page is this

The index is calculated from verified, item-level transactions provided by a panel of 200,000 geographically and demographically representative U.S. households. These data include purchases across everyday categories such as grocery, household goods, and health and beauty, but do not include gasoline. The data capture changes in consumer purchasing behavior when prices change, including brand switching, downsizing, and shifts in where consumers buy.

Values are aggregated monthly to produce index levels and month-over-month and year-over-year percent changes, providing a current view of inflation trends. The dataset uses verified household purchase data from the demand side, offering visibility into consumer behavior as prices evolve.

So they collect data from 4 "regions" -

Northeast
Midwest
South
West

and then will aggregate/average the costs over time. So if you already live in a higher cost area, that reported average includes the lowest cost areas too, and is not going to exactly reflect your area. HOWEVER, the link had plots of all regions on single graphs so you can see the differentials between regions.