British Columbia Ground Water Association
Provides professional and technical leadership in the advancement of the ground water industry and in the protection, promotion and responsible development and use of ground water resources.
http://www.bcgwa.org/

Ground Water Science
well maintenance, well rehabilitation, ground water, wells, Our expertise extends beyond geology to include all relevant aspects of ground water system management - including biology, drilling, well services, and regulatory requirements. Our work integrates all relevant disciplines to most effectively support our customers and their communities in the delivery of safe and reliabl
http://www.groundwaterscience.com/

Canadian Ground Water Association
Welcome to the Canadian Ground Water Association - Ground water industry information and education
http://www.cgwa.org/

Wisconsin Ground Water Association
The Wisconsin Ground Water Association is a non-profit volunteer and professional membership organization whose purpose is to advance the understanding of Wisconsin's ground water resources
http://www.wgwa.org/

Ground Water for Windows Software
Software combines a relational data base and a Ground Water Information System (GWIS). Applications include mapping, well logs, aquifer test analysis, and plotting of water chemistry data.
http://www.geocities.com/karanjac/

USGS -- Water Resources of the United States
Home page for water resources information from the US Geological Survey
http://water.usgs.gov/

USGS Ground-Water Software
Computer codes designed to model various ground-water and related hydrologic and geochemical processes and to help estimate related parameters.
http://water.usgs.gov/software/ground_water.html

Lytle Water Solutions, LLC
Consulting engineers and hydrogeologists specializing in surface and ground water resources
http://www.lytlewater.com/

IGWMC Groundwater Modeling Software
International Ground-Water Modeling Center distributes a large number of practical, public domain and proprietary ground-water programs, ranging from codes based on simple analytical solutions to those incorporating advanced and complex numerical techniques.
http://typhoon.mines.edu/software/

Drinking Water and Health Basics
U.S. EPA Office of Ground Water and Drinking Water information on drinking water and health, including the National Primary Drinking Water Standards, fact sheets on specific drinking water contaminants, and guidance regarding Cryptosporidium for people with compromised immune systems.
http://www.epa.gov/safewater/dwh/index.html