The Southwest and Rocky Mountain states are reviewing a plan that could split Colorado River water based on actual flows, not storage.

A plan to help shore up the depleted Colorado River by cutting off water to alfalfa fields in California's crop-rich Imperial Valley is finding support from the farmers who grow it. The Imperial ...

In Arizona, the Central Arizona Project (CAP) delivers much of the Colorado River water used by Phoenix, Tucson, tribes, and other southern Arizona communities with a 336-mile canal running ...

"In 2024, alfalfa farms in the Colorado River Basin used over 2 trillion gallons of water," Starbuck reported. "This is enough water, to put it in perspective, to supply the water needs for 40 ...

GILA RIVER INDIAN RESERVATION, Ariz.—About 33 miles south of Phoenix, Interstate 10 bisects a line of solar panels traversing the desert like an iridescent snake. The solar farm’s shape ...

If Arizona’s Colorado River water allocation was cut to zero, “we could burn through the available groundwater in 50 years,” Famiglietti said. “We’re talking about decades. That’s scary.