HIAD 2.2
The Hydrogen Incident and Accidents Database
The Joint Research Centre (JRC) of the European Commission maintains HIAD with the financial support of the Clean Hydrogen Joint Undertaking.
HIAD is a repository of hydrogen-related unwanted events. The data were obtained from primary or secondary sources (news, inspection reports from public institutions, other public databases, scientific articles, etc.). A traceable link to the original sources is provided, as far as possible.
HIAD collection of events is a service provided by JRC to safety experts, educators, students and technologists active in the field of hydrogen. It is not intended to serve as an instrument for passing judgement on individual companies or countries associated with an accident. A blame culture surrounding the database would greatly reduce the sharing of information. Moreover, in absence of benchmarks, it cannot be used to compare hydrogen technologies with other technologies.
HIAD events are reviewed and validated by JRC experts before entering the database. However, it is critical to note that events’ quality relies in first instance on the quality of their primary or secondary sources.
HIAD is shared as an Excel file available for download and an online dashboard for quick visualisation of selected parameters. JRC updates the dataset periodically. In 2025, version HIAD 2.2 was issued, bearing improvements to some parameters. HIAD 2.2, containing events up to 31/12/2025, is available to download here since 16/03/2026.
- You can download the Excel file here.
- You can access a beta version of the interactive dashboard here.
- You can find a document explaining what is new in HIAD 2.2 here.
- You can find some information and guidelines here.
Important legal information and conditions of use:
By downloading the Excel file containing HIAD dataset, you automatically accept the following conditions:
- Neither the European Commission nor any person acting on its behalf is responsible for the use which might be made of the information contained in the database HIAD 2.2. The same is valid for the Clean Hydrogen Joint Undertaking.
- Neither the European Commission nor the Clean Hydrogen Joint Undertaking is responsible for the validity of the data contained in the original sources.
- The use of the database and of the data contained within is free of charge, but its use should be properly acknowledged by mentioning the following:
European Hydrogen Incidents and Accidents Database HIAD 2.2, European Commission, Joint Research Centre, Petten, The Netherlands.
- The database is a public service provided by the JRC and the Clean Hydrogen Joint Undertaking, with the knowledge support of the European Hydrogen Safety Panel. You can contribute to this community effort, by sending feedback to JRC or providing new events. We also ask you to inform JRC, when you used HIAD in publications or in shareable reports.
For enquiries and requests of collaboration, please send a message to: JRC-PTT-H2SAFETY@ec.europa.eu
