# Does hydro power lower the CBAM figure for aluminium from Puerto Madryn?

Canonical: https://senseible.earth/answers/puerto-madryn-aluminium-hydro-cbam

Not the charge. For aluminium only direct emissions count toward CBAM: anode CO2, perfluorocarbons and cast house fuel. Hydro and wind power lower the reported indirect emissions and the Scope 3 footprint buyers see, which matters for low carbon contracts.

## What the charge covers

- Anode carbon in the pots.
- CF4 and C2F6 from anode effects.
- Casting furnace fuel.

## Where power helps

Buyers comparing footprints count power. A smelter on hydro and wind can show a much lower cradle to gate figure than one on coal.

## Mixed supply

If part of the power comes from gas, ask for the share by year so the claim matches the supply.

## What Senseible does here

Senseible keeps each site's fuel, power and production records together, so the embedded emissions you send an EU importer trace back to dated documents.

- [Hydro aluminium claims](https://senseible.earth/answers/samalaju-hydro-aluminium-low-carbon-claim)
- [Argentina grid factor](https://senseible.earth/answers/argentina-grid-emission-factor-for-suppliers)
- [Argentina carbon tax](https://senseible.earth/answers/argentina-carbon-tax-cbam-deduction)

Sources: [Regulation (EU) 2023/956 (CBAM Regulation), consolidated](https://eur-lex.europa.eu/eli/reg/2023/956/2025-10-20), [European Commission, CBAM definitive regime](https://taxation-customs.ec.europa.eu/carbon-border-adjustment-mechanism/cbam-definitive-regime_en), [2006 IPCC Guidelines for National Greenhouse Gas Inventories](https://www.ipcc-nggip.iges.or.jp/public/2006gl/)

Last reviewed 2026-10-21.