ENNOH’s 2026 Hydrogen Quality Monitoring Report is the first report of its kind and compiles the most recent information available on the topic, including references to recent studies and work conducted by DG ENER, EASEE-gas, and GIE. It also includes a compilation and synthesis of the materials and events related to the public consultation organised from 30 January to 30 March 2026. A workshop was held on 12 February 2026 as part of the public consultation, and the presentations are included in Annex III.