Arizona officials are celebrating the passage of new groundwater legislation, but setting their sights on upcoming Colorado ...

The Colorado River Basin which supplies water to seven U.S. states is facing "severe water shortages," scientists warn.

Arizona is tussling with other states over how much of the Colorado River it should receive. But how will Arizonans divide ...

Arizona has taken cuts to its Colorado River water since 2022. But a set of agreements among Arizona’s cities, farms and tribes that share the burden of those shortages expires in 2026.

In fact, new research in the journal Restoration Ecology details how scientists have unlocked a breakthrough in their work to save the Santa Cruz River, which runs 180 miles through Arizona and ...

Though trends could change through the rest of the winter, the snowpack in the basin is about 94% of the median for mid-January. While Arizona’s share of Colorado River water in 2025 is already ...