IMGA in its present form was founded in January 2004, but began as an idea ten years before in 1996 when a working group on Medical Geology was established by IUGS.

Its primary aim was to increase awareness among scientists, medical specialists and the general public on the importance of geological factors for health and wellbeing. It was recognised that the limited extent of cooperation and communication among these groups restricted the ability of scientists and public health workers to solve a range of complex environmental health problems. Below follows the history and emergence of IMGA in its current form.