Arizona connected small water systems to municipal supplies to eliminate PFAS, delivering compliant drinking water years ahead of federal deadlines.

Snowpack across the Colorado River Basin remains well below normal, with dry soils and low streamflows persisting into early February 2026.

New research explains how deep Earth processes allowed the Green River to cross the Uinta Mountains and reshape the Colorado River Basin.

Arizona continues a public nuisance lawsuit against Fondomonte, arguing court action is needed alongside new groundwater rules in the Ranegras Plain basin.

A new national study maps groundwater depth at 30-meter resolution, showing where shallow groundwater is common and where uncertainty remains highest.

Interior launches $20M in grants for rural wildfire response as agencies warn the 2026 fire season may be longer and more severe across the West.