Colorado denies Nebraska’s South Platte claims and counters that Nebraska groundwater pumping is taking water belonging to Colorado.

Colorado voters will decide whether existing sales tax revenue should fund water protection, wildfire prevention and land conservation.

Monsoon rain brought some relief to the Colorado River Basin, but extreme drought persists in Colorado, Wyoming, Utah and New Mexico.

A new binational study maps how groundwater moves, recharges and changes beneath the Santa Cruz region of Arizona and Sonora.

California is flooding Suisun Marsh wetlands in summer to produce tiny organisms that provide food for native fish, including Delta smelt.

A World Economic Forum opinion calls the Colorado River’s supply-demand imbalance “water bankruptcy” and points to ways to address it.