As water supplies in the Colorado River decline, Central Arizona is first on the chopping block, leaving cities to compete ...

Deep below the surface of the ground in one of the driest parts of the country, there is a looming problem: The water is ...

Thirty federally recognized tribes lay claim to a fourth of the Colorado River, a vital water source for 40 million people ...

On its surface, floating solar appears to conserve water while generating carbon-free electricity. River managers are ...

The Lower Basin states of Arizona, California and Nevada fully developed their half of the 15 million acre-feet that the 1922 Colorado River Compact granted them and have had to cut back.

As the Colorado River’s reservoirs have declined, even larger amounts of groundwater have been drained from aquifers. Using ...

The Colorado River Basin has lost twice as much groundwater since 2003 as water taken out of its reservoirs, according to a ...

In the midst of negotiations over the future of the overallocated Colorado River, there’s a conference this week in Boulder ...

Researchers found massive depletion of the region's groundwater, adding more stress to the drought-stricken Colorado River.

Arizona Senate President Warren Petersen (R-Gilbert) suggests desalination should be a part of ongoing Colorado River ...

It's ridiculous that we know so little about how much water Arizona stands to lose from the Colorado River. But we can ...