The Department of Energy (DOE) solicited comments on its draft guidance for the Clean Hydrogen Production Standard, a target that will be selected by DOE for the carbon intensity of clean hydrogen. This standard relates to DOE’s implementation of the hydrogen-hub provision of the Bipartisan Infrastructure Law. Policy Integrity and WattTime submitted comments to DOE on how to accurately measure the carbon emissions from using grid electricity to produce hydrogen. In particular, we suggested the use of a marginal-emissions approach instead of an annual-average approach. We also recommended that DOE adhere to rigorous carbon-accounting principles if hydrogen producers want to use market instruments like renewable energy credits or power-purchase agreements to characterize the carbon intensity of hydrogen produced using grid electricity.