The proliferation of public EV charging infrastructure in the US continues, with no sign of slowing down. The total number of public stations of all connector types and charging levels has skyrocketed from less than 1,000 in 2010 to more than 25,000, according to PlugShare Data. 

Ambitious new infrastructure projects continue to be announced, including:

• 25,000 proposed new chargers to be installed by PG&E
• 1,000 new stations in the Kansas City region installed by KCP&L
• new fast charging corridors on the East and West Coasts through a partnership with BMW, VW, and ChargePoint
• eVgo’s expansion of its DC fast charger network from 10 to 25 markets in two years

Figure is free to share (CC BY-SA 2.0) with proper attribution: PlugShare via ChargedEVs.com

Now, thanks to PlugShare’s quarterly infrastructure report, we can track the most active states for new installations. Number one by more than a fivefold margin is (no surprise) California, with 436 new public charging stations* installed in the first quarter of 2015.

1.  California:  436
2.  Florida:  80
3.  Georgia:  67
4.  Washington:  52
5.  Massachusetts:  50
6.  North Carolina:  43
7.  Texas:  40
8.  Ohio:  37
9.  Minnesota:  35
10.  Virginia:  33

[Updated: 5/6/15 8pm EDT to clarify the data set.] 
PlugShare considers a “charging station” to be a physical charging unit installed on the ground or wall, with one or multiple charging connectors. For example, a single DC fast charging unit with both a CHAdeMO and CCS plug counts as one charging station in the data above. A Tesla Supercharger location with six individual charging bays counts as six charging stations. 

The best news of all for PEV drivers: The majority of those public stations are free to use.

Full access to PlugShare Quarterly 2015 Q1 – US Electric Vehicle Infrastructure Exhibits can be purchased here.