Public Health Regulation 2012
Current version for 3 June 2020 to date (accessed 7 June 2020 at 20:14)
13J   Operating requirements
For the purposes of section 29 of the Act—
(a)  a cooling water system must be operated as required by AS/NZS 3666.2:2011, and
(b)  a cooling water system must be equipped with a disinfection procedure that is in operation at all times and that is designed to control microbial growth so that—
(i)  the level of Legionella in the system is less than 10 colony-forming units per millilitre, and
(ii)  the heterotrophic colony count in the system is less than 100,000 colony-forming units per millilitre, and
(c)  there must be safe and easy access to a cooling water system for the purpose of the cleaning, inspection and maintenance of the system.