The table above shows the average retail price of regular gasoline from the U.S. Energy Information Administration, the statistical agency of the Department of Energy. The key facts at the top state the national average in a sentence.
What the table covers
The agency publishes a weekly price for the nation, for its regions and for a short list of states and cities. It does not publish a weekly price for every state, so a state that is missing from the table is missing from the source as well. The region names carry the agency's own labels, such as PADD 1 for the East Coast, which are the districts it uses to report petroleum data.
How to read the changes
Each price is the average for the Monday shown in the line under the key facts. One column compares it with the Monday before, and the other compares it with the same week a year earlier. All prices are in dollars per gallon, including taxes, for regular grade.
When it updates
The agency usually releases Monday's prices on Tuesday, and its page states the date of the next release. This page is updated at the same address after each release.
Do not mix surveys
Other organizations publish daily gas prices from their own surveys, and their numbers differ from these. Every figure on this page comes from the federal weekly survey, so the areas and weeks here can be compared with each other but not with a price quoted from another survey.