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 18, 2017 - Falling again after an eight week climb. Regular is lower than last week's price by a few cents.

The average price in California for regular gasoline decreased 2.3-cents from the previous week. The average statewide price for regular was $3.163. Mid-grade and premium prices decreased as well.

The national average for self-serve regular is at $2.634, down 5.1 cents from the previous week.This is 52.9 cents lower than the price of regular in California.

California Retail
Gasoline Prices Per Gallon
Grade 9/11/2017 9/18/2017
Regular $3.186 $3.163
Mid-Grade $3.321 $3.298
Premium $3.434 $3.408
California Retail
Diesel Prices Per Gallon
Region 9/13/2017 9/20/2017
Northern CA $3.182 $3.177
Central CA $3.098 $3.111
Southern CA $3.131 $3.145

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.