Climate change, drought and heavier pumping are altering groundwater quality as scientists explore new ways to recharge depleted aquifers.

Nearly $2 million is available to fight invasive mussels as zebra mussel DNA is detected in Utah’s Colorado River.

Monsoon rain eased drought in parts of Colorado, Wyoming and Utah, but severe dry conditions persist across much of the Colorado River Basin.

Low river flows halt Grand Valley irrigation as drought drains Colorado reservoirs and leaves Blue Mesa at just 17% of projected live capacity.

Arizona’s largest Colorado River water district clears a procedural step for possible litigation while pushing for a Lower Basin agreement.

Federal agencies are seeking more public input as they work toward a new definition of waters covered by the Clean Water Act.