The requirement for and frequency of testing is a matter for individual hospitals to determine based upon risk assessments and governed by good practice arrangements.Some guidance is provided for example in Scottish Health Technical Memorandum 2027 which recommends water sampling at six-monthly intervals wherever bulk drinking water storage exceeds 1,000 litres and is supplied from the water undertaker.Frequency of sampling where given is provided for initial guidance only as the frequency will vary to suit particular sites...