The poster that is associated with this abstract outlines the planned development of a computational model to determine the levels of air pollution in indoor environments in Dublin city, and hence, the exposure of individuals. A microenvironmental approach will be used, whereby the levels of particulate matter are determined based on the location and the activities taken place in each individual zone. Infiltrated external air pollution, and indoor sources will be considered, as well as indoor transport processes such as aerosol deposition. Microenvironments will include the home, transport vehicles, offices and social outlets. This is the first time that such a modeling approach has been applied in the Irish context.