US annual hydrogen production is approximately 10 million metric tons (1.0E+10 kg), 68% of which is used in petroleum processing, according to the US Department of Energy (DOE). The Toyota Mirai fuel cell vehicle has a hydrogen tank capacity of approximately 5 kg (0.005 metric ton); thus, the annual hydrogen production works out roughly to about 2 billion Mirai tank-equivalents.
About 21% of the hydrogen is used in the production of fertilizer. Most of the hydrogen produced in the United States comes from steam methane reforming.
There are currently 1,600 miles of hydrogen pipeline in the United States and there are large hydrogen production facilities in almost every state.