Arizona Attorney General Kris Mayes calls for a statewide pause on new data centers, citing concerns about water use, power demand and costs.

A 4.25 million-gallon sewage spill in Pueblo contaminated the Arkansas River, prompting warnings to avoid the water downstream.

Utah is ending its toilet rebate program after nearly 6,000 replacements and will shift funding toward outdoor water conservation.

Monsoon storms ease drought in Arizona and New Mexico, while heat and dryness worsen conditions elsewhere in the Colorado River Basin.

California lawmakers approve new protections for workers exposed to sewage, polluted air and other hazards near the Tijuana River.

Cyberattacks on water systems in at least seven states raise new questions about cybersecurity, federal oversight and risks to drinking water.