Under the 1944 Water Treaty — or as it’s officially titled, the “Treaty relating to the utilization of waters of the Colorado and Tijuana Rivers and of the Rio Grande” — the U.S. annually delivers 1.5 million acrefeet of Colorado River water to Mexico, while Mexico sends 350,000 acrefeet of Rio Grande water to the US.
For scale, the Phoenix AMA uses 1 mi…
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