Drought conditions continue across the Colorado River Basin as warm temperatures and limited snowpack shape the West’s early winter outlook.

A federal pilot found ozone nanobubble treatment sharply reduced bacteria and odors in Tijuana River sewage flows, though scaling challenges remain.

Late December storms triggered emergency actions while California moved quickly to capture floodwaters for reservoirs and groundwater recharge.

Arizona officials heard sharply divided public testimony on whether the Ranegras Plain should become an Active Management Area amid rapid groundwater decline.

Federal listening sessions on the WOTUS rule have ended, but written public comments remain open through January 5, 2026. Here is what the proposed changes mean.

Low snowpack in southern Utah is affecting winter recreation at Cedar Breaks National Monument, limiting snowmobiling while snowshoe tours remain planned.