The International Association of Hydrogeologists (IAH) is a scientific and educational organisation whose aims are to promote research into and understanding of the proper management and protection of groundwater for the common good throughout the world.

The IAH is a professional association for those within disciplines and employment related to groundwater, its occurrence, utilization, testing and management.

IAH was established to foster closer ties, cooperation and information exchange related to the study of groundwater.

The IAH publishes the Hydrogeology Journal eight times a year and two book series.

The International Association of Hydrogeologists is a non-profit organization with the following objectives: