Code of Practice for the Prevention and Control of Legionnaires Disease - Western Australia

Service summary

You must comply with this code if you are an employer in charge of a workplace, or in charge of a building which contains workplaces.

This code provides information on how to minimise the risk of infection from the bacteria which cause legionnaires disease. In Australia, the sources of legionella bacteria in recorded outbreaks of legionnaires' disease have been traced to either large air conditioning plants or hot water distribution systems that have been incorrectly commissioned or poorly maintained. However, the bacteria has also been known to accumulate in:

  • Evaporative condensers;
  • Hot and cold water systems;
  • Spas;
  • Humidifiers or foggers and water misting systems;
  • Coolant in industrial milling machines;
  • High pressure cooling and cleansing processes;
  • Potable water aerosols, such as shower heads;
  • Nebulisers; and
  • Other domestic and industrial-based water systems.

Please consult the Contact Officer for more information and to ascertain the level of compliance that may be required.

Service type

Code of Practice

A code of practice can be either a legal requirement or non-legal requirement. Legal codes of practice are defined as a result of legislation. Non-legal codes of practice are defined by industry regulators and bodies.

Administering agency

Department of Commerce
WorkSafe Western Australia

Act(s) name

Occupational Safety and Health Act 1984 (Western Australia)

Contact details

Enquiries Officer, Business Service Centre
Department of Commerce
WorkSafe Western Australia

Operating address:
Level 1, Mason Bird Building
303 Sevenoaks Street
Western Australia 6107
Mailing address:
Locked Bag 14
Cloisters Square PO
Western Australia 6850


08 6251 2200


1300 307 877


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Supporting information


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