Petroleum Data, Facts, and Statistics

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Under the Petroleum Industry Information Reporting Act (PIIRA), the Energy Commission collects data from refiners, producers, petroleum product transporters and marketers, and petroleum pipeline and terminal operators. Each entity is required to submit to the Energy Commission weekly, monthly, and annual reports on receipts, inventory levels, imports, exports, prices, and transportation sources. The Energy Commission analyzes and interprets this information to provide policy makers and the public with key insights on oil supply and demand fluctuations and potential issues. Data, Facts, and Statistics provide specific data and summaries.

California Petroleum Industry and Information

Overview of the Petroleum Industry Information Reporting Act


Refining & Processing


Fuel Price Overview

September 17, 2018 - Holding onto the upward trend for a third week. Regular is higher than last week price by less than a cent.

The average price in California for regular gasoline increased 0.7-cent from the previous week. The average statewide price for regular was $3.520. Mid-grade and premium prices increased as well.

The national average for self-serve regular is at $2.841, up 0.8 of a cent from the previous week.This is 67.9 cents lower than the price of regular in California.

California Retail
Gasoline Prices Per Gallon
Grade 9/10/2018 9/17/2018
Regular $3.513 $3.520
Mid-Grade $3.697 $3.710
Premium $3.809 $3.824
California Retail
Diesel Prices Per Gallon
Region 9/5/2018 9/12/2018
Northern CA $4.013 $4.001
Central CA $3.981 $3.983
Southern CA $3.990 $3.984

Reserves and Production

The U.S. Energy Information Administration (EIA) collects, analyzes, and disseminates independent and impartial energy information. You can find petroleum prices, production and use statistics, and analysis on their Petroleum and Other Liquids page.

The California Department of Conservation, Division of Oil, Gas & Geothermal Resources (DOGGR) oversees the drilling, operation, maintenance, and plugging and abandonment of oil, natural gas, and geothermal wells. You can find information regarding oil production, and well maps on the DOGGR website.