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Biofuels sustainability
Carbon intensity standard
Producers and suppliers must reduce the CI of their fuel pool by 20% below 2017 levels by 2038. The base line of 2017 for gasoline is 98.93 gCO2e/MJ and for diesel is 100.11 gCO2e/MJ. There are several ways for fuel suppliers to achieve these reductions, including:
    •Producing/blending low-carbon biofuels into the fuel they sell
    •Purchasing credits generated by low-carbon fuel providers, including electric vehicle charging providers.
Washington´s Carbon Intensity standards for gasoline and diesel
Calendar Year
Washington CI Standard for Gasoline (gCO2/MJ)
Washington CI Standard for Diesel (gCO2/MJ)
2023
98.44
99.61
2024
97.97
99.11
2025
96.95
98.11
2026
95.96
97.11
2027
94.97
96.11
2028
93.49
94.60
2029
92.00
93.10
2030
90.52
91.60
2031
89.04
90.10
2032
89.04
90.10
2033
89.04
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Biofuels sustainability