New research finds the Upper Colorado River Basin lost an estimated 4.6 trillion gallons of groundwater during a severe drought, raising concerns about Western water supplies.

African antelope brought to New Mexico decades ago for hunting could eventually spread across much more of the West as climate change brings warmer winters, according to new research.

New satellite observations show that some global river models struggle to account for dams, reservoirs and other human influences, raising questions about their reliability for water planning.

Droughts and wet periods in major Western watersheds often happen together, according to new research that shows how water conditions in one area can be closely tied to those hundreds of miles away.

New federal data shows a wide gap in the amount of carbon pollution produced by electricity generation across the West, reflecting stark differences in how states produce their power.

Microplastic concentrations in Nevada’s Truckee River increased nearly tenfold during spring runoff, according to new research that offers a glimpse into how plastic pollution moves through some western waterways.

Wildfires are burning more land in watersheds that provide water to communities across the West, raising concerns about water quality and infrastructure as fires become larger and more frequent.

In Wyoming’s Beartooth Mountains, scientists are studying ice that has survived for thousands of years — and what could help some patches persist as the climate warms.

New research finds only a small portion of the nation’s rivers may be able to maintain today’s diversity of fish and other aquatic wildlife as the climate warms.

Reservoirs across the West are slowly losing space to store water as dirt, sand and other sediment pile up behind dams, according to new, sweeping, nationwide research.