The Department's involvement in matters concerning the health effects of non-ionising radiation, which includes radio frequency emissions from mobile telephone base stations, is guided by advice from national and international health authorities. The advice is based on findings of peer-reviewed scientific and medical literature, and on deliberations at scientific meetings of established expert groups such as the International Commission for Non-Ionising Radiation Protection. The Commission for Communications Regulation is undertaking a survey of 400 communication sites. The first 100 results have been published, all of which are well below the limits outlined by the international commission. These results also include the installation at Dangan, County Tipperary.