With the Colorado River shrinking and its water rights in flux, the Central Arizona Project has assembled a coalition to ...

A Feb. 14 deadline came and went without Arizona and the other Colorado River basin states coming to terms on a new operating agreement.

Eight landowners want to develop homes in areas of Pinal and Maricopa counties once off-limits to new residential development ...

Add Yahoo as a preferred source to see more of our stories on Google. Roughly 36% of Arizona’s water comes from the Colorado River, secured in part by a 1963 Supreme Court ruling. But the current ...

Falling water levels are a threat to the aquifer in an agricultural region of western Arizona dominated by Saudi-owned farming conglomerate Fondomonte, state regulators told residents in a public ...

With state leaders failing to come to an agreement, Arizona and its cities may face bigger cuts than previously expected. If ...

The Arizona Republic used air quality records to estimate how much energy could be guzzled by data centers in Maricopa County. It's a big number.

A new experimental technology called cloud seeding was used successfully to produce more rain in Pinal County last year.

Proposals to desalinate seawater to help boost Arizona's water supplies moved forward at a meeting of a state financing board. A desalination plant could be built in California or Mexico, allowing ...

DENVER (AP) — Arizona, Nevada and Mexico will again live with less water from the Colorado River as drought lingers in the West, federal officials announced Friday. The Colorado River is a critical ...