The El Paso water supply used to be known for its high levels of litium. Then, of course, there is Lithia Springs, Ga.
Mineral Wells Tx too
Same in Lithia Springs in Ashland Oregon. Extracting lithium for ocean water has been tested for decades but never feasible. Maybe the Salton Sea has enough to make it worth while but doubtful. Besides. The environazis will never let cheap clean harvesting of anything on American soil or water. There is an endangered speckled newt that ONLY lives right there.