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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Date published: October 2, 2018

USGS Prepares to Measure Flooding Across Arizona

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

Date published: September 27, 2017

Levels of Possible Human Carcinogen Declining in Most Wells in Tucson International Airport Superfund Site

Levels of a potential human carcinogen, 1,4-dioxane, have mostly declined in wells in the commercial and residential areas of the Tucson International Airport Area Superfund Site during 2002-2017, according to a new map published by the U.S. Geological Survey.

Date published: January 24, 2017

Uranium in Spring Water North of Grand Canyon Likely Not Related to Nearby Mining Activity

Uranium levels in Pigeon Spring, just north of the Grand Canyon, are likely due to a natural source of uranium and not related to the nearby former Pigeon Mine, according to a recent study by the U.S. Geological Survey.


Year Published: 2018

Findings and lessons learned from the assessment of the Mexico-United States transboundary San Pedro and Santa Cruz aquifers: The utility of social science in applied hydrologic research

Study RegionThis study region encompasses the Transboundary San Pedro and Santa Cruz aquifers which are shared between the states of Sonora (Mexico) and Arizona (US). Special regional considerations include a semi-arid climate, basin-fill aquifers with predominantly montane recharge areas, economic drivers in the mining, trade, and military...

Callegary, James B.; Megdal, Sharon B.; Tapia Villaseñor, Elia María; Petersen-Perlman, Jacob D.; Minjárez Sosa, Ismael; Monreal, R.; Gray, F.; Grijalva Noriega, Francisco

Year Published: 2018

Assessment of environmental flows in the middle Verde River watershed, Arizona

This report summarizes analyses of middle Verde River watershed environmental flows detailed in U.S. Geological Survey Scientific Investigations Report 2017-5100, “Preliminary synthesis and assessment of environmental flows in the middle Verde River watershed, Arizona," by N.V. Paretti, A.M.D. Brasher, S.L. Pearlstein, D.M. Skow, B. Gungle, and B....

Gungle, Bruce W.; Paretti, Nicholas V.
Gungle, B., and Paretti, N.V., 2018, Assessment of environmental flows in the middle Verde River watershed, Arizona: U.S. Geological Survey Fact Sheet 2018-3062, 6 p.,

Year Published: 2018

Changes in Earth’s gravity reveal changes in groundwater storage

Changes in the amount of water stored in underground aquifers cause small changes in Earth’s gravitational field. The U.S. Geological Survey’s Southwest Gravity Program has developed methods for measuring terrestrial gravity changes with part-per-billion precision. The measurements allow scientists to map changes in groundwater storage and to...

Kennedy, Jeffrey R.
Kennedy, J.R., 2018, Changes in Earth’s gravity reveal changes in groundwater storage: U.S. Geological Survey Fact Sheet 2018–3032, 4 p.,