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Coordination with agencies and organizations in the Central Arizona Basins Study Unit was integral to the success of this water-quality assessment. We thank those who served as members of our liaison committee.

Federal Agencies
Bureau of Indian Affairs
Bureau of Reclamation
Centro de Investigación y Estudios Ambientales
Comisión Nacional del Agua
International Boundary and Water Commission
National Park Service
Natural Resources Conservation Service
Salt River-Pima Indian Community
Tohono O’odham Nation
U.S. Environmental Protection Agency
U.S. Fish and Wildlife Service (USFWS)
U.S. Department of Agriculture, Forest Service
U.S. Department of Agriculture, Water Conservation Laboratory

State Agencies
Arizona Department of Environmental Quality (ADEQ)
Arizona Department of Water Resources (ADWR)
Arizona Game and Fish Department (AzGF) }
Arizona Geological Survey

Local Agencies
City of Phoenix
City of Tucson
Maricopa County
Pima Association of Governments
Pima County
Southern Arizona Association of Governments

Arizona State University
University of Arizona

Other public and private organizations
Arizona Toxics Information
Friends of the Santa Cruz River
Salt River Project
Southern Arizona Water Resources Association
The Nature Conservancy

We thank the following individuals and organizations for contributing to this effort.

Laurie Wirt (USGS) designed and guided the surface-water-quality sampling program for the CAZB from 1994 to 1996.
Doug Towne and Maureen Freark (ADEQ) coordinated with CAZB to design cooperative ground-water studies in the Upper Santa Cruz Basin and the Sierra Vista subbasin.
Salt River Project, ADEQ, and ADWR provided valuable data for our study.
Buckeye Water Conservation and Drainage District, City of Phoenix, City of Peoria, Town of Buckeye, City of Goodyear, Roosevelt Irrigation District, and numerous individual landowners allowed us access to their wells and data.
Terry Short, Lisa H. Nowell, A.B. Richards, and Steve Goodbred provided invaluable asssistance and guidance for the CAZB biological data collection and reports.
Patrice Spindler (ADEQ), Kirke King (USFW), Kirk Young (AzGF), W.L. Minckley, and Paul Marsh (ASU) provided information and expertise for the biological aspects of this project.
Karen Beaulieu, Dave Peyton, Joe Capesius, Christie O’Day, Ann Tillery, Melissa Butler, Todd Ingersol, Ray Davis, David Graham, Ken Galyean, Frank Oliver, Rodrigo Morales, Tasha Lewis, Dawn McDoniel, Herb Pierce, Cory Angeroth (USGS), Tom Rees (volunteer), and Brian Popadac (volunteer) assisted with data collection and compilation.
Sid Alwin, Pat Rigas, Doug Cummings, and John Callahan (USGS) contributed their talents to the preparation of this report.
Norm Spahr and Joe Domagalski (USGS), Marlene Baker (Concerned Citizens About Responsible Environment), Jeanmarie Haney (Tucson Regional Water Council), and many NAWQA Program staff provided valuable reviews of this report.
We extend special thanks and appreciation to our spouses, families, and friends, without whose support we could not have accomplished the work described herein.

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U.S. Geological Survey Circular 1213

Suggested citation:

Cordy, G.E., Gellenbeck, D.J., Gebler, J.B., Anning, D.W., Coes, A.L., Edmonds, R.J., Rees, J.A.H., and Sanger, H.W., 2000, Water Quality in the Central Arizona Basins, Arizona, 1995–98: U.S. Geological Survey Circular 1213, 38 p., on-line at

U.S. Department of the Interior, U.S. Geological Survey
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