Aquifer Science & Technology
www.aquiferscience.com

Baski, Inc.
www.baski.com

Brown and Caldwell
www.brownandcaldwell.com

Central Arizona Project
www.cap-az.com

CH2M Hill
www.ch2m.com

Clear Creek Associates
www.clearcreekassociates.com

Columbia Analytical
www.caslab.com

Daniel B. Stephens & Associates, Inc.
www.dbstephens.com

E. L. Montgomery and Associates, Inc.
www.elmontgomery.net

Geoscience Support Services, Inc.
www.gssiwater.com

GeoSystems Analysis, Inc.
www.gsanalysis.com

Golder Associates, Inc.
www.golder.com

HACH Environmental
www.hachenvironmental.com

Hargis + Associates, Inc.
www.hargis.com

HydroGeophysics, Inc.
www.hgiworld.com

HydroSystems, Inc.
www.hydrosystems-inc.com

Instrumentation Northwest
www.inwusa.com

LFR Levine-Fricke
www.lfr.com

Midwest GeoSciences Group
www.midwestgeo.com

MWH Americas Inc.
www.mwhglobal.com

Regenesis
www.regenesis.com

RockWare Inc.
www.rockware.com

Roscoe-Moss
www.roscoemoss.com

Solinst
www.solinst.com

SonTek/YSI
www.sontek.com/

Stewart Brothers Drilling Co.
www.stewartbrothers.com

TAM International
http://www.tamintl.com

URS Corporation
www.urscorp.com

Ward Groundwater
www.wardgroundwater.com

Water Management Consultants Inc.
www.watermc.com/

Water Systems Engineering
http://www.h2osystems.com/

Zonge Engineering and Research
Organization Inc.
www.zonge.com

ZymaX Envirotechnology Inc.
www.zymaxusa.com

Arizona Hydrological Society www.azhydrosoc.org

American Water Resources Association
www.awra.org

The Environmental and Engineering Geophysical Society
www.eegs.org

The Groundwater Resources Association of California www.grac.org

The Groundwater Foundation
www.groundwater.org

National Ground Water Association
www.ngwa.org

Nevada Water Resources Association
www.nvwra.org

Water Systems Council
www.watersystemscouncil.org

The University of Arizona College of Agricluture and Life Services
www.ag.arizona.edu

University of California Cooperative Extension Program
groundwater.ucdavis.edu

Consortium of Universities for the Advancement of Hydrologic Science
www.cuahsi.org

Desert Research Institute
www.dri.edu

Environmental Protection Agency
www.epa.gov

University of Arizona Dept. of Hydrology and Water Resources
www.hwr.arizona.edu

International Ground Water Modeling Center at Colorado School of Mines
typhoon.mines.edu

The Arid West Water Quality Research Project
www.co.pima.az.us/wwm/wqrp

New Mexico Water Resources Research Institute
wrri.nmsu.edu

Sustainability of semi-Arid Hydrology and Riparian Areas
www.sahra.arizona.edu

U.S. Geological Survey
www.usgs.gov

Universities Council on Water Resources
www.ucowr.siu.edu