As part of the agreement, Mexico must provide the U.S. 1.75 million acre-feet of water from the Rio Grande over five-year intervals, or about 350,000 acre-feet annually.
And the U.S. provides Mexico with 1.5 million acre-feet from the Colorado River annually.
An acre-foot of water is the amount of water covering one acre to a depth of one foot and equals about 326,000 gallons of water.
Therefore, 1 million acre-feet of water equals around 326 billion gallons.
That’s enough to fill more than 492,000 Olympic swimming pools.
But Mexico has fallen short on its obligations.
The last five-year cycle ended in October with Mexico owing about 800,000 acre-feet of water, Texas Gov. Greg Abbott’s office says.
Drought in the northern part of Mexico has played a part in the shortfall.
Earlier this year scientists warned that Mexico could be short of its water obligations.
"Unless there is a hurricane to fill up international reservoirs, Mexico will be unable to comply with approximately 1000 million cubic metres in the next three months," Rosario Sanchez, a senior research scientist for the Texas Water Resources Institute at Texas A&M, told TRT World in August. "More permanent drought conditions in the Rio Grande Basin, increase in water demand by both sides, and reduced water availability in the river has contributed to the problem.”
And when farmers don’t have the necessary resources, crops suffer.
A study from Texas A&M estimated losses in the Rio Grande Valley at almost $1 billion in 2023.
The work by the U.S. and Mexico will see Mexico release a large volume of water this week.
Mexico will provide the U.S. with 202,000 acre-feet of water beginning Dec. 15, the USDA says, adding the two sides are working to finalize a complete repayment plan by the end of January 2026.
And if Mexico continues to violate the water treaty, the U.S. will impose a 5 percent tariff on Mexican products, Secretary Rollins said.