The source of your state’s electricity matters for EV owners because it directly affects the real-world environmental impact of charging your vehicle. An EV charged in California, where over a third of electricity comes from solar, produces significantly fewer emissions than the same vehicle charged in a state that relies heavily on coal or natural gas.
Electricity generation varies widely across the United States. Some states draw heavily on renewable sources like hydro, wind, and solar, while others still rely primarily on natural gas, nuclear, or coal. The mix is also changing rapidly as states add renewable capacity each year.
The U.S. Alternative Fuels Data Center (AFDC) maintains an interactive tool that shows the electricity source breakdown for every state alongside a comparison of annual emissions per vehicle type — All Electric, Plug-in Hybrid, Hybrid, and Gasoline. Even in states with a higher proportion of fossil fuel generation, electric vehicles typically produce lower overall emissions than gasoline vehicles.