ISO 19870-1:2026

Hydrogen technologies — Methodology for determining the greenhouse gas emissions associated with the hydrogen supply chain Part 1: Emissions associated with the production of hydrogen up to the production gate (Edition 1, 2026)

What is ISO 19870-1?
ISO 19870-1 specifies a methodology for quantifying greenhouse gas (GHG) emissions associated with hydrogen production, from raw material extraction up to the production gate.

It is part of the ISO 19870 series, which applies carbon footprint and life cycle assessment (LCA) principles to the hydrogen supply chain. This first part focuses specifically on emissions generated during hydrogen production, regardless of the production pathway used.

The standard builds on ISO 14067 and ISO 14044 to provide a consistent and internationally recognized framework for calculating the carbon footprint of hydrogen.

Why is ISO 19870-1 important?
Hydrogen is a key enabler of decarbonization, but its environmental impact varies significantly depending on how it is produced. Identical hydrogen molecules can have very different GHG emissions profiles.

ISO 19870-1 addresses this challenge by providing a robust and harmonized methodology to quantify emissions. This helps avoid miscounting and double counting, supports transparency and enables the development of credible low-carbon hydrogen markets.

By standardizing how emissions are measured, the standard supports policy frameworks, certification schemes and investment decisions aligned with global climate goals such as the Paris Agreement.
General information
Status : Published
Publication date : 2026-04
Stage : International Standard published
Edition : 1
Number of pages : 126