Conducting tests for radon is not a function of the Health and Safety Authority. This function the responsibility of the Radiological Protection Institute of Ireland, RPII, which is the designated competent national authority for this purpose.
The relevant Irish legislation is the Radiological Protection Act 1991 (Ionising Radiation) Order 2000 (S.I. No. 125 of 2000). Under the Safety, Health and Welfare at Work Act 1989, employers are required to identify hazards arising in the workplace, assess the risks arising from those hazards and put in place measures to eliminate or control the risk measures. The authority, through seminars, etc., has reminded employers located in areas likely to exceed the threshold limit value set out in the statutory instrument of their obligations under the 1989 Act if the limit value is exceeded.