Cooling towers and warm water systems


The Public Health Act 2010 and Public Health Regulation 2012 define the roles and responsibilities for managing cooling water systems and other regulated systems.

Cooling water systems must be managed safely in order to prevent the growth and transmission of Legionella bacteria. The legislation requires a risk management approach to managing cooling water systems.

Building occupiers are required to ensure that there are six key safeguards in place for their cooling water systems:

  1. Risk assessment of Legionella contamination, documented in a Risk Management Plan (RMP) – every five years (or more frequently if required)
  2. Independent auditing of compliance with the RMP and Regulation – every year
  3. Providing certificates of RMP completion and audit completion to Council
  4. Sampling and testing for Legionella and heterotrophic colony count – every month
  5. Notifying reportable laboratory test results (Legionella count ≥1000 cfu/mL or heterotrophic colony count ≥5,000,000 cfu/mL) to Council
  6. Displaying unique identification numbers on all cooling towers (Unique identification number is provided by Council).

View the guidelines for the safe and effective management of cooling water systems prepared by NSW Health.

Council is required to maintain a register of cooling water and warm-water systems installed the Ku-ring-gai area. The occupier of the premises has the responsibility to notify Council of the installation of a cooling water or warm water system and any changes to the contact details.

To notify a cooling water or warm water system or to update any contact information complete our online notification form below.


To submit certificates of completion of a Risk Management Plan or audit or to notify reportable test results lodge the information here