After you head northeast on Ranch Road 652 from tiny Orla, it’s easy to miss the precise moment you leave Texas and cross into New Mexico. The sign just says “Lea County Line,” and with 254 counties in Texas, you’d be forgiven for not knowing there isn’t one named Lea.

But the folks who are selling water over it know exactly where the line is.

That’s because on the Texas side, where the “rule of capture” rules groundwater policy, people basically can pump water from beneath their land to their heart’s content. But on the New Mexico side, the state has imposed tight regulations on both surface and groundwater that restrict supply… Read more from the Texas Tribune