In 1890, fire destroyed an entire business block in Flagstaff. In 1921, engineers reported that the Lyman Dam on the Little ...

The amount of snowmelt expected to reach the key reservoirs on the Colorado River this spring is far below the median of the ...

What influence does the Colorado River have on resupplying Arizona’s groundwater shortage over the last few years? This is ...

Arizona recycles more than half its wastewater, the second-highest rate among the seven states on the Colorado River, a new study found. If all seven states on the river reused as much water as ...

California, Arizona and Nevada are urging the Trump administration to change course on the Colorado River. The states are ...