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Revives U.S.-Mexico Border Groundwater Study, Adds Arizona
Recent Bills/Revives U.S.-Mexico Border Groundwater Study,...

Revives U.S.-Mexico Border Groundwater Study, Adds Arizona

IntroducedJune 22, 2026
In the Senate2 days ago
Intro
Senate
House
Pres
Ready for a Senate vote.
No date is set.
Water Resources DevelopmentArizonaEnvironmental assessment, monitoring, researchHydrology and hydrographyMexicoNew MexicoTexasWater resources funding
More:Bills in the SenateEnvironmentSenate Bills
Why This Matters
Right now

Congress authorized funding for the U.S.-Mexico shared aquifer? study program only for fiscal years? 2007 through 2016.

This bill restarts a federal program that maps and studies underground water shared by the U.S. and Mexico. It also expands the program to include border aquifers in Arizona, not just New Mexico and Texas.

If you live in southern Arizona outside the Yuma area, groundwater under your region could now be studied as a priority by this federal program through 2036.
Who this affects
Border-state residents · Farmers and ranchers near border · Local water utilities · Arizona water managers
What this bill changes
  1. 1Extends the program's funding authorization?, which ran from 2007 through 2016, to cover fiscal years 2026 through 2036.
  2. 2Allows border aquifers in Arizona to be named priority study areas, joining New Mexico and Texas, which current law already covers.
  3. 3Excludes the aquifer under Arizona and Sonora, Mexico, that sits partly in the Yuma groundwater basin from the priority list.

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IntroducedJun 22
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House
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The President

Donald Trump
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