Tony Davis

A federal Colorado River plan could eventually dry up the Central Arizona Project. Arizona is joining a lawsuit challenging the proposed cuts.

The federal government has accepted a plan proposed by Arizona, California and Nevada that will cut Arizona's Colorado River supply by 31% over the next two years, the Los Angeles

Tucson Water and others that take Central Arizona Project water will be spared deep cuts — at least for now — if the U.S. approves a 2-year plan.

A new Arizona water report says only about 3% of the state’s precipitation reaches groundwater aquifers. Researchers recommend expanding stormwater capture, recharge projects and forest management efforts to help offset

Judge Scott Blaney's ruling Tuesday marked the second time in t wo months he has overturned efforts by the Arizona Department of Water Resources to

Nearly 75 groups and other entities representing a wide range of interests want Congress to pony up at least $2 billion to invest in water conservation and efficiency programs and

Arizona, Nevada and California would still have to take massive cuts in their Colorado River water supplies under a new, preliminary plan devised by the U.S. Bureau of Reclamation, Arizona

Very dry and warm weather in the winter and early spring means Colorado River flows into Lake Powell will hit record lows this summer, a new federal forecast says.

Arizona, California and Nevada say they've put together a proposal to stabilize the ailing Colorado River by saving at least 3.2 million acre-feet of water through 2028.

A mediator might be needed to break a long deadlock in how to divvy up water from the Colorado River among states, a commission says.