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Welcome to the Arizona Water Science Center

The Continuous Slope-Area Method

Providing 5-minute water-level data during floods in remote areas

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Arizona Water Science Center

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.

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Featured Science

Schematic of lithology in the Grand Canyon area related to breccia pipe uranium mining.

The USGS  has collected groundwater chemistry samples since 1981 in the Grand Canyon region to better understand changes in groundwater quality that may be the result of mining activities and to identify "hot spots" with elevated metal concentrations. This manuscript presents results for the assessment of uranium in groundwater in the Grand Canyon region.

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Publications

Hydrologic response of groundwater and streamflow to natural and anthropogenic drivers of change in headwaters of the upper Colorado River basin during recent wet (1982–1999) and drought (2000–2022) conditions Hydrologic response of groundwater and streamflow to natural and anthropogenic drivers of change in headwaters of the upper Colorado River basin during recent wet (1982–1999) and drought (2000–2022) conditions

Study region: Headwaters of the upper Colorado River basin (UCOL), USA Study focus: Surface-water and groundwater numerical models incorporating water-use information were used to investigate changes in climate, water use, and simulated hydrologic responses of snow processes, evapotranspiration, groundwater, and streamflow during recent wet (1982–1999) and drought (2000–2022) periods in...
Authors
Fred Tillman, Melissa Masbruch, Jacob E. Knight, John Engott, Samuel Lopez, Casey Jones, Jesse Dickinson, Matthew P. Miller
By
Arizona Water Science Center

Salinity or sum of constituents— Methods comparison for computing dissolved solids concentrations in streams of the Upper Colorado River Basin Salinity or sum of constituents— Methods comparison for computing dissolved solids concentrations in streams of the Upper Colorado River Basin

The Colorado River is an important water source in the southwestern United States and northern Mexico. High concentrations of dissolved solids in the river, sourced mainly from the Upper Colorado River Basin (UCOL), cause hundreds of millions of dollars in damages annually to crops and infrastructure. Determinations of total dissolved solids (TDS) in river and tributary samples often...
Authors
Fred Tillman, Matthew P. Miller, Daniel Wise, R. Blaine McCleskey, Natalie Day
By
Water Resources Mission Area, Arizona Water Science Center

Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2019–2021 Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2019–2021

The Navajo (N) aquifer is an extensive aquifer and the primary source of groundwater in the 5,400-square-mile Black Mesa area in northeastern Arizona. Water availability is an important issue in the Black Mesa area because of the arid climate, past industrial water use, and continued water requirements for municipal use by a growing population. Precipitation in the area typically ranges...
Authors
Jon P. Mason
By
Water Resources Mission Area, Arizona Water Science Center
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