40 million people. 7 states. 1 overcommitted river reaching its limits.
The 1,450-mile Colorado River drains 7 US states and 2 Mexican states. It carved the Grand Canyon and delivers drinking water, irrigation, and hydropower — but rarely reaches the sea anymore.
The 1922 Compact allocated 17.5 million acre-feet per year based on an unusually wet period. The actual long-term average is only 12-13 million — a 4-5 million acre-foot annual deficit persisting for decades.
About 80% of Colorado River water goes to agriculture — growing alfalfa, cotton, and other crops. California's Imperial Irrigation District alone uses more water than Nevada and Arizona combined.
Upper Basin (CO, UT, WY, NM) vs. Lower Basin (AZ, NV, CA) tensions are boiling. Arizona bore the deepest mandatory cuts. Nevada offset by recycling. California held the oldest rights and resisted longest.
In 2023, the federal government threatened unilateral cuts if states didn't agree. A 3-state deal (AZ, CA, NV) to reduce use by 3 million acre-feet through 2026 secured $1.2B in IRA conservation funding.
Under the 1944 US-Mexico Water Treaty, Mexico is entitled to 1.5M acre-feet annually. But the river rarely reaches the Mexican delta. The Colorado's delta ecosystem has largely died.
Water economists propose: (1) Water markets for trading rights. (2) Paying farmers to fallow fields. (3) Massive investment in water recycling. (4) Xeriscape mandates for cities. (5) Renegotiating the 1922 Compact for climate reality.
Get expert analysis of US water policy, climate science, and sustainability solutions at Sustainability Awakening.