Canadian Ground Water Association: Organization information and public education material on ground water and wells.
GSA Hydrogeology Division: Programs, awards,and 2x/year newsletter of the Geological Society of America Hydrogeology Division.
Illinois Groundwater Consortium: Working toward providing a scientifically valid basis for agricultural chemical management and regulatory decisions affecting groundwater.
International Association of Hydrogeologists: Groundwater all over the world: organization information, journal contents, and links.
National Ground Water Association: Groundwater scientists and engineers, as well as manufacturers and contractors in the water well industry.
Wisconsin Ground Water Association: Non-profit volunteer organization advancing understanding of Wisconsin's ground water (scientific, technical, legal, educational, and public policy aspects).