A new U.S. Geological Survey assessment points to a major domestic opportunity for the electric vehicle market: lithium resources in the Appalachian region could help reduce the nation’s reliance on imported battery materials while supporting long-term EV production.
According to USGS, the eastern U.S. contains an estimated 2.3 million metric tons of undiscovered, economically recoverable lithium. At last year’s import levels, that would be enough to replace 328 years of U.S. lithium imports. The agency also estimates that the resource could support batteries for 130 million electric vehicles.
For the EV sector, the finding is significant because lithium remains a critical input for lithium-ion batteries used in EVs, grid storage and other technologies. The U.S. currently has one sole lithium producer and relied on imports for more than half of the lithium used last year, according to USGS.
The new assessment identifies lithium in pegmatites, large-grained rocks similar to granite. USGS estimates the southern Appalachians hold about 1.43 million metric tons of lithium oxide, concentrated in the Carolinas, while the northern Appalachians hold about 900,000 metric tons, concentrated in Maine and New Hampshire.
The potential advantage for EVs is not only the size of the resource, but its location. A larger domestic lithium base could help give automakers, battery manufacturers and fleet operators more confidence in the long-term availability of key battery materials. That matters as companies continue to evaluate EV deployment, charging investments and total cost of ownership in a market where supply-chain certainty remains a major factor.
USGS noted that global lithium demand continues to rise and projected that world production capacity for lithium will double by 2029. The agency also said lithium supply security has become a priority for technology companies.
While the assessment does not mean new supply will immediately reach the market, it highlights the scale of domestic resources that could support future EV battery production. For fleets and manufacturers, the broader takeaway is clear: building a stronger U.S. lithium supply chain could become an important part of making EV adoption more scalable, resilient and economically competitive.
