The U.S. government may have to impose a Colorado River management plan on the states, Arizona's water chief said Friday.

Negotiators couldn't strike a deal in Salt Lake City this week. Can 7 governors make peace in time to avoid a court battle?

Across two continents, officials are confronting the same nightmare scenario: a reservoir so depleted it can no longer move ...

While California has faced recent downpours, water levels at Lake Mead sit at just 33 percent full. Lake Mead, in the Colorado River system, is an important supplier of water to the Golden State. It ...

The long-vacant downtown hotel on the western edge of downtown Tucson will reopen as a 296-room Arizona Hotel HSL Hyatt.

Attorney General Kris Mayes in a southern Arizona town hall called out Tucson Electric Power's deal with the Project Blue ...

Officials in drought-stricken Arizona are moving to regulate groundwater use on the state's western edge, where wells have ...

Tucson city leaders unveiled a precautionary plan to monitor, document and take legal action should such federal troops ...

The Center for Biological Diversity is accusing federal appraisers of ignoring water concerns in southern Arizona, leading to ...

After Marana approved rezoning for a new data center Tuesday night, and Pima County closed on the land sale for Project Blue ...

PHOENIX (AP) — A former Republican lawmaker who questioned the integrity of Arizona’s elections and served as a leader for the conservative group Turning Point Action was sentenced Tuesday to ...

Religious rights advocates and First Amendment experts say the ability of Native peoples to exercise religious rights is at ...