Hide Alert

Welcome to our new website. Learn more about what's new.

Transportation fuel supplier reports

Transportation fuel suppliers are required to report their greenhouse gas emissions to us based on the information they already submit to the Washington Department of Licensing. Businesses that must report are those with active fuel tax licenses that supply enough applicable fuels to meet or exceed 10,000 metric tons of carbon dioxide emissions per year. 

Petroleum product producers and importers have separate reporting requirements. If your business is both a transportation fuel supplier and a petroleum product producer or importer, you need to report using both the method on this page and the method on the greenhouse gas reporting page.

Applicable fuels

The following fuels need to be reported.

  • All taxable gallons of motor vehicle fuel, including:
    • Gasoline
    • Ethanol
  • All taxable gallons of special fuel, including:
    • Diesel
    • Biodiesel
    • Propane
    • Nature gas
    • Kerosene
    • Any other combustible liquid or gas used to power a motor vehicle, except fuel that is subject to the tax imposed by Chapter 82.36 RCW.
  • Some aviation gasoline and jet fuel. (See transportation fuel supplier calculator for details.) 

Reporting threshold

The reporting threshold is 10,000 metric tons of carbon dioxide emissions. Reporting requirements are based on the amount of annual carbon dioxide released from the complete combustion or oxidation of your fuels, not by the number of gallons you supply. However, you can use the table below to estimate if you are close to the reporting threshold, based on the gallons you supply. Any of the values below individually or in combination should be enough to require reporting. You need to use the transportation fuel supplier calculator to officially determine your emissions.

Fuel type Approximate fuel sold annually in Washington to meet 10,000 metric tons of carbon dioxide emissions (gallons per year)
Gasoline                                      1,100,000
Ethanol 1,700,000
Diesel 970,000
Biodiesel 1,000,000
Jet fuel 1,000,000
Aviation gasoline 1,200,000

Steps for transportation fuel suppliers

Follow these steps to report your greenhouse gas emissions. Reports are due by Oct. 31.
Determine if you are required to report Complete the certificate of representation registration Calculate your annual emissions Complete signature form