Skip to content
Contact us
  • There are no suggestions because the search field is empty.

How do I calculate AdBlue emissions?

AdBlue is a urea-based solution injected into the exhaust of diesel engines to reduce nitrogen oxide (NOx) emissions. AdBlue consumption is not a significant source of GHG emissions, but its production and transport have embodied emissions so should be included in Scope 3.

AdBlue (also called Diesel Exhaust Fluid) relates to Scope 1 emissions, under direct fuel use, but with some nuance:

  • What AdBlue is:

    • It’s a urea-based solution injected into the exhaust of diesel engines to reduce nitrogen oxide (NOx) emissions.

    • It doesn’t itself emit greenhouse gases when used correctly; it’s part of emission control technology.

  • GHG accounting treatment:

    • The combustion of diesel fuel used in the vehicle produces Scope 1 emissions (direct fuel combustion).

    • AdBlue consumption is not a significant source of GHG emissions, but its production and transport have embodied emissions.

  • How to categorise AdBlue emissions:

    • Direct use (combustion): No direct CO₂e emissions from AdBlue itself → included indirectly in Scope 1 because it’s part of vehicle operation.

    • Upstream production of AdBlue: Falls under Scope 3, Category 3 – Fuel- and energy-related activities (not included in Scope 1 or 2).

    • If AdBlue is purchased as part of vehicle operation, those upstream emissions can optionally be reported here.