Arizona Water Science Center
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Welcome to the U.S. Geological Survey Arizona Water Science Center. Our mission is to collect and interpret high quality, impartial scientific information to provide resource managers and the public with the knowledge required to understand and manage the critical water resources of Arizona and the Southwest.
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National Water Dashboard - Arizona
Explore real-time streamflow, groundwater, and water-quality conditions in Arizona and across the nation.
Current ConditionsFeatured Science
A Century of Watching the Colorado River - A streamgage at Lees Ferry Turns 100 yeard old
Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.
Read moreNews
Uranium in Grand Canyon Region Groundwater Mostly Complies with Federal Health Standards
Nearly 95% of samples collected from 206 locations over 40 years show uranium concentrations less than the U.S. Environmental Protection Agency Maximum Contaminant Level for drinking water, according to a new U.S. Geological Survey report.
A Century of Watching the Colorado River
Right where the Colorado River flows into the mouth of the Grand Canyon, an inconspicuous 20-foot-high concrete tower rises from the riverbank.
USGS Arizona Water Science Center to participate in Colorado River Low Flow event
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 probably a lot more important than you might think.
Publications
Preliminary geohydrologic assessment of Buenos Aires National Wildlife Refuge, Altar Valley, southeastern Arizona
The Buenos Aires National Wildlife Refuge is located in the southern part of Altar Valley, southwest of Tucson in southeastern Arizona. The primary water-supply well at the Buenos Aires National Wildlife Refuge has experienced a two-decade decrease in groundwater levels in the well, as have other wells in the southern part of Altar Valley. In part...
Owen-Joyce, Sandra J.; Callegary, James B.; Rosebrough, Amy Elizabeth
Assessing potential groundwater-level declines from future withdrawals in the Hualapai Valley, northwestern Arizona
A numerical groundwater flow model of the Hualapai Valley Basin in northwestern Arizona was developed to assist water-resource managers in understanding the potential effects of projected groundwater withdrawals on groundwater levels in the basin. The Hualapai Valley Hydrologic Model (HVHM) simulates the hydrologic system for the years 1935...
Knight, Jacob E.; Gungle, Bruce; Kennedy, Jeffrey R.
Occurrence, fate, and transport of aerially applied herbicides to control invasive buffelgrass within Saguaro National Park Rincon Mountain District, Arizona, 2015–18
The spread of the invasive and fire-adapted buffelgrass (Cenchrus ciliaris L.) threatens desert ecosystems by competing for resources, increasing fuel loads, and creating wildfire connectivity. The Rincon Mountain District of Saguaro National Park addressed this natural resource threat with the use of glyphosate-based herbicides (GBHs). In 2010,...
Paretti, Nicholas V.; Beisner, Kimberly R.; Gungle, Bruce W.; Meyer, Michael T.; Kunz, Bethany K.; Hermosillo, Edyth; Cederberg, Jay R.; Mayo, Justine P.