Cotton Capital: The Largest Contiguous Cotton Region on Earth

Drive out from Lubbock in any direction in late summer and the land tells you what it is for. Row after row of cotton, stretching to the flat horizon, the bolls opening white against the brown earth. The South Plains of Texas form the largest contiguous cotton-growing region in the world, a designation that has been applied to this area for decades and remains in use.

Cotton came to the South Plains with irrigation. The Ogallala Aquifer, an underground formation deposited over millions of years from sediment eroded from the Rocky Mountains, sits beneath roughly one hundred seventy-four thousand square miles of the Great Plains, extending from South Dakota south to the Texas Panhandle. The Texas portion of the aquifer is among the shallowest and most intensively used. Center-pivot irrigation systems, developed after World War Two, made it possible to pump water from hundreds of feet below the surface and distribute it across the flat terrain in precise arcs.

The cotton economy transformed the region. Lubbock grew from a small ranching supply town to a regional hub processing millions of bales annually. The city became the economic center of a multicounty agricultural zone that touches the lives of tens of thousands of farming families and supports an entire infrastructure of gins, warehouses, and equipment dealers.

The problem is geological time versus human time. The aquifer recharges through rainfall at a rate measured in fractions of an inch per year. The pumping rate is measured in tens of billions of gallons annually. In the southern portions of the aquifer, beneath the Texas South Plains, beneath the cotton fields around Lubbock, the saturated thickness has declined by more than half since large-scale irrigation began in the nineteen forties and nineteen fifties. Once depleted, the aquifer will require an estimated six thousand years to replenish naturally.

Water is the subtext of every conversation here about the future.