Arizona groundwater is a lifeline that sustains cities, tribal communities, farms, and plants and animals. Learn the basics.

New data shows that water levels in major reservoirs including Lakes Mead and Powell are well below average for this time of ...

Dead fish are being reported at two Arizona lakes. Wildlife officials say poor water quality caused by below-average precipitation is to blame.

There's no other place in Arizona that comes as close to a European village as the English Village in Lake Havasu City.

The Southwest and Rocky Mountain states are reviewing a plan that could split Colorado River water based on actual flows, not storage.

The Colorado River irrigates farms, powers electric grids and provides drinking water to 40 million people. But as its supply dwindles, a crisis looms.

With record heat, surging trail use, and rising tensions over e-bikes and erosion, Arizona’s outdoor spaces are under ...

Satellite imagery captured by Landsat 7, a joint mission of the United States Geological Survey (USGS) and NASA, show a stark contrast in Lake Mead's water levels between July 1999 and May 2024, with ...

Oversight was loosened as the camp operated and expanded in a dangerous flood plain in the years before the floods, a review ...

A report shows that both Mead and Powell have "reached alarmingly low levels, holding just one-third of their usual capacity.

Mariners Trail, Point Beach State Forest, the Wisconsin Ice Age Trail and Woodland Dunes Nature Center make our list of great ...

Highway closures and evacuations remain in effect as a wildfire burns more than 49,000 acres in Coconino County. It is one of two blazes raging at or near the northern rim of the Grand Canyon.