EPA’s new WOTUS proposal narrows federal oversight of waterways, drawing strong support from industry and sharp criticism from environmental groups.

Arizona will keep its drought declarations in place as a weak La Niña and long-term dry conditions challenge snowpack, reservoirs and watershed health.

The latest Drought Monitor shows dry conditions across most of the U.S. while storms strengthen in the West. Arizona, Utah, Colorado, and Nevada stay warm and dry.

The Colorado River Indian Tribes have approved a resolution granting personhood to the Colorado River under tribal law.

New research on managed aquifer recharge highlights its benefits, physical and economic constraints, legal obstacles, and emerging equity concerns. It also outlines policy options that could help...

Seven states missed the federal deadline to divide the Colorado River, as tensions rise between Upper and Lower Basin negotiators.