U.S. President Donald Trump threatened to impose a 5% tariff on all Mexican goods unless the country releases 200,000 acre-feet of water, which he says is owed under a decades-old treaty.

Posting on Truth Social, U.S. President Donald Trump accused Mexico of falling hundreds of thousands of acre-feet behind on its commitments outlined in the 1944 water-sharing pact, which regulates flows from the Colorado, Tijuana, and Rio Grande rivers.

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“As of now, Mexico is not responding, and it is very unfair to our US Farmers who deserve this much needed water,” Trump wrote.

The water shortfall, according to Trump, is affecting crops and livestock in Texas. Farmers in the state have long urged Washington to pressure Mexico into fulfilling the treaty’s terms. The 1944 agreement requires Mexico to deliver 1.75 million acre-feet of water to the US over a five-year cycle.

Politico reports that Trump’s post came after he met with farmers and lawmakers from agriculture-focused states.

“Mexico continues to violate our comprehensive Water Treaty, and this violation is seriously hurting our BEAUTIFUL TEXAS CROPS AND LIVESTOCK… Mexico has an obligation to FIX THIS NOW.” – President Donald J. Trump pic.twitter.com/m4V1KEW0Lm

— The White House (@WhiteHouse) December 8, 2025

Mexico’s Stance

Mexican authorities admit they’re behind on required water deliveries, blaming an extended drought intensified by climate change for the setback. They’ve pledged to supply 420,000 acre-feet by October, though that still won’t meet the total obligation.

So far, the Mexican government has issued no public reply to Trump’s newest comments.

The U.S. currently imposes a 25% tariff on multiple Mexican imports — from steel and aluminum to cars and car parts.

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