Under COSHH Regulations 2002 and ACoP L8, employers have legal duty to prepare and manage a scheme for maintaining safe water quality. Paragraph 12 of ACoP L8 states, “As well as requiring risk assessments, they (Health &Safety at Work Act 1974 & Management of Health & Safety at Work Regulations 1999) also require employers to have access to competent help in applying the provisions of health and safety law”.
HSG274 is a three-part technical guidance document which further details the control measures that are required to prevent the growth of Legionella bacteria in cooling water systems, domestic hot and cold water systems as well as other risk systems. Other legal statutes regarding water storage and supply include The Water Supply (Water Fittings) Regulations 1999 and The Water Byelaws 2000 (Scotland). Supporting guidelines are BS 8558.
Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages , HTM 2040 NHS Estates 1993 The control of Legionella in health care premises , BS 4485 Water Cooling Towers etc.