Founded the 5th January 1976, the Irish Group membership has grown from 10 to over 130, and draws individuals from professional backgrounds ranging from academic to state agencies to private consultancies. The committee consists of a council of six: President, Secretary, Treasurer, Conference Secretary, Fieldtrip Secretary, Education & Publicity Secretary, plus a conference sub committee of three.
Regular activities of the Irish Group consist of an annual two day conference (currently held in Tullamore), an annual weekend fieldtrip, and a series of monthly lectures/technical discussion meetings. A copy of the opening lecture by C.R. Aldwell at the opening of the Irish Branch of the International Association of Hydrogeologists in Trinity College Dublin, March 23rd 1976 is provided here.