Annual update of emission factors

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Position Green Admin

This is first batch of releases of the annual update of emission factors in the emission factor library, released on September 2nd, 2025.


New data

  • DEFRA (2025)
    • activity-based emission factors covering multiple emission sources, including fuels, refrigerants, heat & steam, passenger & delivery vehicles, water, materials, waste, freight, business travel, employee commuting, hotel stay, and homeworking
  • EPA (2025)
    • US-specific activity-based emission factors covering multiple emission sources, including fuels, heat & steam, transport, waste, business travel, and employee commuting
  • NTM (2025)
    • emission factors covering default and benchmark transport data, including passenger & delivery vehicles, business travel, and employee commuting
  • Energiföretagen (2025)
    • average and supplier-grid specific district heating emission factor for Sweden. Data published in 2025 covers data for 2024 due to a one-year lag in reporting.
  • Green Deal co2emissiefactoren (2025)
    • average district heating emission factor for the Netherlands
  • Position Green Integrated Report (2025) 
    • average spend-based emission factor for Position Green services.
      Data published in 2025 covers data for 2024 due to a one-year lag in reporting.
  • Trafikverket, emissionsfaktorer vägtrafik (2024)
    • average distance-based emission factor for various vehicles in Sweden. The latest update in the emission factor library is data published in 2024 (covering data for 2022), corrected by Trafikverket at the beginning of 2025.
    • Input from Trafikverket: No new data is to be published during 2025 (covering data for 2023). Next release expected in Dec 2025/Jan 2026 and will cover data for 2024.
  • Drivkraft Sverige Beräkningsfaktorer (2025) & Energimyndigheten Drivmedel 2024 (2025) & Trafikverket Vägtrafikens utsläpp 2024 (2025)
    • emission factors based on the average fuel sold in Sweden. Sources are combined in the emission factor library to enable reporting of tank-to-wheel (TTW), well-to-tank (WTT) and well-to-wheel (WTW), as well as to calculate distance-based emission factors.
      Data published in 2025 covers data for 2024 due to a one-year lag in reporting.
  • SJ (2025)
    • emission factors for train travel with SJ trains.
      Data published in 2025 covers data for 2024 due to a one-year lag in reporting.


Data changed


  • Energiföretagen
    • Source reference hasn't been consistent with other emission factor sources, where the year in parentheses should refer to the year of publication. This source has used the year reference to what year the data refers to, i.e. previous references of e.g. "Energiföretagen (2023)" should have been "Energiföretagen (2024)" as that is when the data was published. This has been updated and adjusted in annual 2025 update. Please note that emission factors remain unchanged.


  • Trafikverket, emissionsfaktorer vägtrafik
    • Source reference hasn't been consistent with other emission factor sources, where the year in parentheses should refer to the year of publication. This source has used the year reference to what year the data refers to, i.e. previous references of e.g. "Trafikverket, emissionsfaktorer vägtrafik (2022)" should have been "Trafikverket, emissionsfaktorer vägtrafik (2023)" as that is when the data was published. This has been updated and adjusted in annual 2025 update. Please note that emission factors remain unchanged.
    • Upon review of historical data, the following emisson factors were identfied as being rounded and/or inconsitent in historical data from previous version. These historical data have been updated and adjusted as part of annual update:
      • Car gas/petrol
      • Car PHEV electricity/diesel
      • Car PHEV electricity/petrol
      • Moped petrol
      • Truck without trailer gas
      • Truck without trailer, liquid gas


Upcoming releases


  • AIB
    • emission factors covering country-average electricity generation factors in Europe
    • Expected release: Source data already published by source, but emission factor library updates are still pending IEA data to avoid partial updates of electricity-related emission factors.
  • IEA
    • emission factors covering country-average electricity generation factors, T&D losses and well-to-tank emissions
    • Expected release: Still not released by IEA, expected in end of September and available in emission factor library beg-mid of October.
  • Energimarknadsinspektionen
    • emission factor covering electricity generation for Nordic electricity mix
    • Expected release: Source data already published by source, but emission factor library updates are still pending IEA data to avoid partial updates of electricity-related emission factors.
  • Finnish Energy
    • average district heating emission factor for Finland
    • Expected release: No details on when updated data will be available.
  • CTR, HOFOR and VEKS
    • average district heating emission factor for Denmark
    • Expected release: Data already published by source, but emission factor library updates are still pending other district heating data to avoid partial updates of district heating emission factors.
  • Green-e & e-Grid
    • emission factors covering electricity generation factors in the US
    • Expected release: No confirmed dates on when updated data will be available, but generally this is in December.
  • RISE
    • emission factors covering food & beverages in Sweden
    • Expected release: No confirmed dates on when updated data will be available, but this is generally in December.

For more information please see this spreadsheet for details.

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