MITERD CADv2025 methods and changes
Summary
| Publisher | Ministerio para la Transición Ecológica y el Reto Demográfico (MITERD) |
| Full name | Factores de emisión. Registro de huella de carbono |
| Description | The Ministry for the Ecological Transition and the Demographic Challenge (MITECO) is the Spanish government department responsible for developing and implementing national policies on environmental protection, energy, climate change, water resources, biodiversity, and demographic challenges. Its mission encompasses ensuring ecological balance, promoting sustainable energy, and addressing issues related to population dynamics, such as rural depopulation. |
| Version nr. | MITERD CADv2025 |
Source Documents
Publication and Version Reference
MITERD publishes updated emission factors annually in May. Each publication represents the data from the year past but is judged to be representative for the year of publication. See table below
| Version name | Data published in | Data based on | Used in C+A+D for |
|---|---|---|---|
| MITERD 2024 | May 2025 | 2024 | 2025 CCFs |
| MITERD 2025 | May 2026 | 2025 | 2026 CCFs |
Methodology Readout Notes
General Methodology
Where the source provides a per-gas breakdown, individual gas values were read out and GWP-weighted using AR6 values. Biogenic CO₂ emissions were read out where explicitly stated in the source.
The following electricity supply categories are implemented:
| Source category (ES) | Description | C+A+D keyword |
|---|---|---|
| Mix sin garantías de origen | Grid mix without guarantees of origin | General – mix sin garantías de origen |
| Con 100% garantías de origen renovable | 100% renewable guarantees of origin | General – con 100% garantías de origen renovable |
| Garantías de origen cogeneración de alta eficiencia | High-efficiency cogeneration guarantees of origin | General – garantías de origen cogeneración de alta eficiencia |
| Por comercializadora – garantías de origen efectuadas | Per supplier, with guarantee of origin redemptions | Por comercializadora – garantías de origen efectuadas |
Suppliers classified as "etiquetado de comercializadoras que no han efectuado redenciones de GdO" (labeling of utility suppliers that have not made guarantee of origin redemptions) are not included, as no redeemed guarantees of origin are associated with their supply.
No residual mix calculations are applied.
Approximation of Generation and Transmission & Distribution (T&D) Emissions
Well-to-tank (WTT) upstream emissions are applied to the total CO₂e value, including any biogenic component, as the source does not provide a WTT split by emissions type.
MITERD does not publish lifecycle stage emission factors. Upstream generation and T&D emissions are estimated via a loss factor approach (GHG Protocol Scope 2 Guidance, p. 96). A fixed proportional increase is applied to the core electricity production emission factor. These ratios are applied uniformly across all supply categories.
| Lifecycle stage | Loss factor |
|---|---|
| Transmission & Distribution | 10% |
| Generation (fuel-cycle) | 20% |
The loss factors above are approximations. They are applied uniformly and do not reflect supplier-specific or regional grid characteristics.
The 20% generation factor is taken from the total CO₂e value including biogenics.
Data Considerations and Notes
Estimated biogenic component for certain biofuels
For certain biofuels where the biogenic component was not available in the original source, the biogenic component of an adjacent biofuel factor was used as an approximation.