Added length to the southern Arizona border wall may lead to the extinction of a rare desert fish, the Center for Biological Diversity said Wednesday.

It's a rare sight in Arizona. This is how you can see a human-made waterfall created by releasing excess water.

The investment supports the efforts of the Colorado River District, the state of Colorado, and a coalition of West Slope ...

In the final days of President Joe Biden’s presidency, the Colorado River District locked down the $40 million award from the ...

The Bureau of Reclamation will pay $86.7 million toward Tucson's new water treatment plant, which will stretch the city's ...

• An Arizona native who now lives in Tempe, Gomez served under Gen. George Patton during World War II and fought on both ...

A project to bring drinking water to Gallup, the Navajo Nation and the Jicarilla Apache Nation has received a lifeline of ...

Gov. Katie Hobbs began the 2024 legislative session saying she was “optimistic’’ about working with the Legislature.

News about Tucson Water's plans to treat sewage effluent to drinking quality coincided this week with national headlines: New ...

Tucson City Councilmembers voted to approve a proposal to use some $86 million worth of Bureau of Reclamation funding to ...

Releases from the Aspinall Unit will be increased from 500 cfs to 550 cfs today, January 3rd. Releases are being increased as flows on the lower Gunnison River continue to trend downward to the ...