After passing "a rigorous state performance evaluation," the hydrogen refueling station and research center at Cal State University Los Angeles has become the first station in Southern California allowed to sell hydrogen by the kilogram. Every other station that charges can only charge a fixed amount per tank, regardless of the amount dispensed.
There's a huge international infrastructure dedicated to putting gasoline and diesel fuel into our cars. A nationwide infrastructure for electric vehicles also exists, even if it could be beefed up a bit in some areas. But when it comes to hydrogen cars, the infrastructure hows and wheres and whats don't have complete answers yet. Sandia National Lab says maybe we should be looking underground.