The largest underground water supply in the United States—responsible for sustaining a vast share of the nation’s farming—is steadily running dry, raising concerns about future food production and price volatility as supplies come under strain.
The Ogallala Aquifer, which lies beneath eight Great Plains states from South Dakota to Texas, provides roughly 30 percent of the groundwater used for irrigation in the U.S. and supports around a fifth of the country’s agricultural output.
But water levels have been falling for decades, raising fresh concerns about how long one of the world’s most important food-producing regions can continue to rely on it.
In some areas, groundwater levels have dropped by more than 200 feet since large-scale irrigation began, according to U.S. Geological Survey data—one of the clearest signs of long-term depletion. Satellite analyses have also shown widespread declines across the aquifer, with maps revealing concentrated losses in heavily irrigated parts of Texas and Kansas.
A NASA Earthdata analysis has mapped what researchers described as the “human footprint” on the aquifer, showing how widespread pumping for agriculture has reshaped groundwater levels across the region. The findings add to a growing body of evidence that the system is being depleted far faster than it can naturally recharge.
Hellbound and Down 