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Cooling Water Systems and Warm Water Systems

Regulated systems are cooling water systems and warm water systems. 

The Public Health Act 2010 sets out parameters in governing regulated systems in order to safely manage and prevent the growth and transmission of Legionella bacteria.  Legionella bacteria cause Legionnaire’s disease and can be a life-threatening condition. 

Registration of Cooling Water Systems and Warm Water Systems

It is a legal requirement for all owners and/or occupiers of buildings who install and operate a cooling water system or warm water system (regulated system) to notify Georges River Council under s31 Public Health Act 2010.

Registration could also include any changes to the system when any of the following occurs:

  • a new system is installed on a premises
  • there is a change of owner or occupier for a building on which a system is located
  • the system is modified (for example, cooling towers added or removed)
  • the contact details for the building manager changes
  • the system is decommissioned.

To register or update information regarding your regulated system please complete our Public Health Registration Form.

New changes to legislation

As of 10 August 2018, building occupiers are responsible for these 6 keys features listed in the Public health Amendment (legionella Control) Regulation 2018.


Key features – Occupiers Responsibilities

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 the local government authority
4 Sampling and testing for Legionella and heterotrophic colony count – every month
5 Notifying reportable laboratory test results (Legionella count >1000cfu/mL or heterotrophic colony count >5,000,000 cfu/mL) to the local government authority.

Report to be submitted to Georges River Council no later than 24 hours after receipt by the occupier.  

6 Display unique identification numbers on all cooling towers.


Public Health Regulation 2012 requires standard forms to be used for Risk Management Plans, Audit Reports, Monthly Reports and Notification of Reportable Test Results.  These plans, reports and notifications can be submitted to Council electronically.

For further information visit NSW Health.

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