As of May 2019, there were more than 68,800 Level 2 and DC fast charging units throughout the United States. Of that total, 16%, or approximately 10,860 units, were DC fast chargers that make long-distance travel more practical for electric vehicles (EV).
A DC fast charger adds 60 to 80 miles of range per 20 minutes of charging, while a Level 2 charger adds 10 to 20 miles of range per one hour of charging.
California has the most EV charging units of any state at 22,620, which represents about a third of the nationwide total; however, there are 18 other states that have more than 1,000 Level 2 and DC fast charging units, combined.
Counts include both public and non-residential private charging units. A charging unit refers to a single charge point. An EV charging station may have multiple units.
Source: Alternative Fuels Data Center.