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HIAD 2.1

The Hydrogen Incident and Accidents Database

The Joint Research Centre (JRC) of the European Commission developed the Hydrogen Accidents and Incidents Database (HIAD) in the frame of the European Network of Excellence HySafe. In 2017, the JRC executed a major upgrade producing HIAD 2.0, with the financial support of the FCH 2 JU. HIAD 2.0 has been integrated into the activities of the European Hydrogen Safety Panel (EHSP). In 2023, JRC released a new version, HIAD 2.1, aiming at improving some descriptors and containing several new events.


HIAD is a repository of hydrogen-related unwanted events that have occurred in the past. The data were obtained from a primary or secondary source (news, inspection reports from public institutions, other public databases, scientific articles, etc.). HIAD maintains a traceable link to the original sources as much as possible.

In December 2020, HIAD 2.0 was moved offline due to new security measures and currently is being accommodated in the Minerva platform as a standalone Excel file available for download, allowing users to access and analyse the data according to their needs. The first HIAD dataset shared on this platform was an EXCEL file dated 1 January 2022. You find now a new version, with a slightly new structure and more events, updated to January 2024.

All HIAD events are first reviewed and validated by JRC experts before entering the database. JRC validation is based on criteria related to the quality and coherence of the event descriptions. Their quality depends on the quality and the level of detail provided by the sources. To guide the users, a quality label has been assigned to each event. The database contains also a lesson learned and causal analysis whenever possible based on the information available.

The collection of HIAD events is a service provided by JRC to hydrogen all safety experts, educators, students and technologists active in the field of hydrogen. It is not intended to serve as 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, it cannot be used to compare hydrogen technologies with other technologies.

You can download the Excel file here.

You can also download the supporting document containing information on the new structure and providing some guidance on how to use the data.

An interactive tool to enhance HIAD 2.1 visualisation as well as provide user-customised analytical functions is under development and will be available soon. You can access a beta version of the interactive tool here.

Important notice

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 2.1. The same is valid for the Clean Hydrogen Joint Undertaking. Moreover, neither the European Commission nor the Clean Hydrogen JU 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 2.1, European Commission, Joint Research Centre

If HIAD 2.1 has been useful for your work, JRC would appreciate receiving feedback from you.
Also for further enquiries and requests of collaboration, please send a message to: