Bill would hit Mexican farm imports with tariffs if Rio Grande water deliveries fall short

What does this do?

Senate bill S 4549 addresses Mexico's required water deliveries to the United States under a 1944 treaty, which mandates at least 350,000 acre-feet of water per year from the Rio Grande, averaged over five-year periods. The bill would establish an annual review of whether Mexico has met that requirement. If a shortfall is found, the U.S. government could impose tariffs on Mexican imports, rising the longer the shortfall continues, with a focus on Mexican agricultural products and goods from regions that use Rio Grande water.

Who does it affect?

South Texas farmers in the Rio Grande Valley who depend on treaty water for crop production are the primary group affected. Federal agencies that manage border water issues, the Agriculture Department, and U.S.-Mexico trade relations are also directly involved.

Why does it matter?

Mexico has frequently fallen short of its treaty delivery obligations, which has reduced water available to South Texas farmers and caused income losses in the region. The bill creates financial and trade consequences tied to the size and duration of any water delivery shortfall.

What does it cost, and who pays?

• Tariff revenue goes to a trust fund
• USDA calculates per-farmer payments
• Payments based on water volume and value