The Petroleum Industry Information Reporting Act (PIIRA) requires all retail transportation fueling stations in California to file a Retail Fuel Outlet Annual Report (CEC-A15). These stations report retail sales of gasoline, diesel, and other transportation fuels. Sales data reported does not include commercial fleets, government entities, or rental facilities/equipment yards.

Number of Retail Fuel Stations by Fuel – Survey Responses

Reporting Year Gasoline Diesel E851 Propane Natural Gas3 Total Stations
Survey Responses
Total Stations
Estimated

2009

8,138

3,826

30

726

52

8,369

9,790

2010

7,707

3,715

36

679

42

7,965

9,800

2011

8,036

3,942

42

809

48

8,343

9,710

2012

7,748

3,847

51

805

32

8,038

10,219

2013

7,044

3,579

59

699

46

7,293

10,076

2014

6,369

3,416

56

714

29

6,594

10,080

2015

7,240

4,095

81

573

139

7,516

10,309

2016

8,456

4,790

111

651

164

8,924

10,481

2017

8,353

4,854

127

349

142

8,872

10,353

2018

8,256

4,873

148

381

155

8,684

10,266

Source: California Energy Commission
*Stations by fuel type will not equal total respondents due to stations often dispensing multiple fuel types.

Stations by county

Retail Sales Volumes – Survey Responses (Million Gallons)

Reporting Year Gasoline Diesel E851 Propane Natural Gas2
2009 12,764 1,393 1.38 40.87 3.84
2010 12,238 1,285 2 32.64 4.09
2011 12,644 1,346 3.89 19.82 7.26
2012 12,241 1,325 5.12 25.44 6.6
2013 11,418 1,262 7.31 13.99 6.17
2014 10,220 1,227 4.99 18.23 3.94
2015 12,044 1,592 11.99 13.83 41.19
2016 13,787 1,743 16.85 9.09 45.16
2017 13,936 1,717 23.01 6.24 45.61
2018 13,475 1,602 32.04 4.04 37.82

Source: California Energy Commission

A15 Report Responses vs. Board of Equalization (BOE) (Million Gallons)

  Gasoline Diesel
Reporting Year Survey Responses % Differences BOE3 Taxable Survey Responses BOE4 Taxable
2009 12,764 13.80% 14,814 1,393 2,580
2010 12,238 17.60% 14,861 1,285 2,590
2011 12,644 13.40% 14,606 1,346 2,622
2012 12,241 12.70% 14,486 1,325 2,603
2013 11,394 21.60% 14,540 1,262 2,740
2014 10,220 30.40% 14,701 1,227 2,776
2015 12,044 20.30% 15,108 1,592 2,825
2016 13,787 11.0% 15,492 1,743 3,005
2017 13,936 10.6% 15,584 1,717 3,124
2018 13,475 12.9 % 15,471 1,601 3,074

Source: California Energy Commission
Note: BOE tracks all gasoline and diesel sales in California for taxation purposes, but accounts for those sales at the finished fuel terminal level where taxation first occurs. Because of this, BOE gasoline and diesel sales have no regional dimension available. The CEC-A15 tracks fuel sales at the retail level, station by station, but since the current number of stations is constantly changing and the full station population is unknown, staff uses the total known BOE gasoline and diesel sales figures as a benchmark to achieve in data collection efforts. Differences in these two figures estimate the amount of sales underreported in CEC-A15 results.

Sales by county

California Annual Retail Fuel Outlet Report Results (CEC-A15) Spreadsheets

The following Excel files contain annual CEC-A15 results and analyses summarized in county level tables for station counts, gasoline sales, and diesel sales. Figure in the workbooks graphically display the gasoline sales and diesel sales tables.

Methodology for Estimating Stations and Sales

Using a statistical resampling methodology, staff estimates the total gasoline station population by matching gasoline sales reported by the California Board of Equalization (BOE). This is done by using a subset of the CEC-A15 reporting stations to estimate the characteristics of the missing fueling station population. Since large fueling retailer chains are easier to survey due to their visibility, the resampling is weighted toward smaller retailers as it is assumed they are the primary non-responders to this report.¥

1 According to the Air Resources Board (ARB), E-85 dispensed, in California, averages 83 percent ethanol and 17 percent gasoline.
2 Natural Gas survey responses are measured in Gasoline Gallon Equivalent (GGE).
3Source: California Energy Commission (CEC) analysis of Board of Equalization (BOE) taxable gasoline figures.
4 Source: BOE taxable diesel figures which include taxable retail sales and taxable non-retail sales.