News

All users of the Colorado River now have a more efficient way to find U.S. Geological Survey science critical to its future management.

About 12% of 230 groundwater sites sampled in the Grand Canyon region over 45 years show arsenic concentrations greater than the U.S. Environmental...

“Groundwater is a critical water resource in Arizona, and mostly invisible” said Fred Tillman, USGS research hydrologist and lead author of the study...

The Southwest Biological Science Center, Arizona Water Science Center, and Western Geographic Science Center have teamed up to bring you informative &...

Nearly 95% of samples collected from 206 locations over 40 years show uranium concentrations less than the U.S. Environmental Protection Agency...

Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.  

Is there really more water at the USGS Lees Ferry gaging station than Glen Canyon Dam is releasing just a few miles upstream? That question is...

The U.S. Geological Survey announced Friday the completion of a new mobile tool that provides real-time information on water levels, weather and flood...

The USGS Arizona Water Science Center has published three reports documenting the findings of a comprehensive groundwater study conducted from 2015...

Reporters: Do you want to accompany a USGS field crew as they measure flooding? Please contact Jennifer LaVista or Jim Leenhouts