Stakeholders in hydrogen production, conditioning, and transport, including policymakers, investors, and certification bodies.

It complements other ISO standards on environmental assessments and management, as it provides specific guidance on the assessment of GHG emissions associated with the hydrogen value chain. It is based on a life-cycle analysis as defined by ISO 14067, the generic standard for product carbon footprint. This is consistent with the comprehensive list of greenhouse gases contained in IPCC Assessment Reports.

ISO/TS 19870:2023 provides a standardized framework for GHG emissions assessment in hydrogen technologies. Thereby it:

• Enhances transparency and comparability in the hydrogen market.
• Supports informed decision-making and policy formulation on hydrogen deployment.
• Facilitates the certification and sustainability assessment of hydrogen.
• Contributes to global efforts to mitigate climate change.

No, ISO/TS 19870:2023 focuses on providing a methodology for GHG emissions assessment without setting specific thresholds for classifying hydrogen as "clean" or "sustainable". GHG emissions thresholds for qualifying hydrogen as “clean”, “sustainable” or “low carbon” are introduced in national legislation to reflect and serve the policy choices of countries, including the preferred hydrogen production pathways, which may include renewables-, nuclear- or CCS-enabled technologies. Thresholds vary across jurisdictions. The ISO methodology provides a common global benchmark to be able to compare different national approaches in a transparent manner.

Yes, ISO/TS 19870:2023 includes a life-cycle analysis covering hydrogen production, conditioning, and transport to delivery/ consumption gate. It takes into consideration all relevant stages including upstream methane emissions for hydrogen produced from methane/ natural gas, as well as capital goods’ (CAPEX) emissions.

ISO/TS 19870:2023 serves as a critical tool for building trust in hydrogen as an asset class and can inform certification schemes by providing a global benchmark methodology for GHG emissions assessment of hydrogen.

ISO/TS 19870:2023 and ISO 19870-1:2026 address the same overall objective – the determination of greenhouse gas (GHG) emissions associated with hydrogen – but they differ in status, structure, and scope.

ISO/TS 19870:2023 is a Technical Specification that provides a single, consolidated methodology covering the production, conditioning, and transport of hydrogen to the consumption gate. It was developed to respond quickly to market needs and to support early harmonization of GHG accounting practices for hydrogen.

ISO 19870-1:2026 is an International Standard and the first published part of the new ISO 19870 multi‑part series, which will replace the Technical Specification. Part 1 focuses on the methodology for hydrogen production and conditioning, while other aspects of the value chain (such as transport) are addressed in separate parts of the series. The series structure allows for greater technical detail, clearer requirements, and easier future updates.

ISO/TS 19870:2023 remains available for purchase during the transition period, until all parts of the ISO 19870 series are published.