A new report finds that Lakes Mead and Powell, the nation’s largest reservoirs, could store just 9 percent of their combined ...

A group of leading experts on the Colorado River say Western states urgently need to cut water use to avert a deepening crisis.

Officials representing Wyoming and other Upper Colorado River Basin states say they’re alarmed about the continued fragile condition of the river.

The Colorado River is in trouble: Not as much water flows into the river as people are entitled to take out of it. A new idea might change that, but complicated political and practical negotiations ...

SCOTTSDALE, Ariz.—Arizona mayors, from major metropolises to rural agriculture communities, came together Wednesday to announce a new coalition focused on protecting the state’s share of the Colorado ...

On the headwaters of the Colorado River, water managers fear they are on the brink of a system failure as drought and climate change rewrite the old rules. Winter snowpack is no longer a reliable ...

The authors of a new study say the Colorado River's huge reservoirs hold less useable water than the numbers suggest.

LOS ANGELES (AP) — Earlier this year, several environmental groups sent a petition to the federal government with a seemingly ...

Farmers near Meeker, in northwestern Colorado, have been diverting water from the White River to flood their fields for ...

The first adult zebra mussels have been found in the Colorado River near Grand Junction, following increased testing and ...

Water managers and state wildlife officials last year hoped the discovery of a microscopic zebra mussel larva in the Colorado River was a one-time event, not a sign of a larger problem lurking beneath ...