This four-year EPA-funded project is being led by South East Technological University (SETU) and is being carried out in collaboration with UCD, UoG and the EPA’s Radiation Monitoring Laboratory. The aim of the project is to develop a better understanding of the geographical distribution of natural and artificial gamma-emitting radionuclide concentrations in the Irish terrestrial environment with a view to providing a more accurate, up to date estimate of the average annual effective dose that a member of the Irish public receives as a result of exposure from terrestrial gamma radiation.