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Cooling towers and legionella control
Cooling towers are defined as a ‘regulated system’ under the Public Health Act 2010. During their operation they create a warm environment which is favourable to the growth and proliferation of legionella and other bacteria. For this reason, the Public Health Act 2010 and Public Health Regulation 2012 specify requirements for cooling towers and other regulated systems to minimise the risk of legionella outbreaks.

The Legionella bacteria can cause a type of pneumonia (an infection of the lung), which can be fatal, known as Legionnaires disease and/or Pontiac fever (a mild flu-like illness). The disease has an incubation period from 2 to 10 days for the symptoms to develop after inhaling the bacteria. The legionella bacteria are transmitted through aerosols.

Outbreaks of Legionnaires disease occur from time to time but are preventable. Legionella bacteria can grow in poorly operated and maintained water-cooling systems and warm-water systems, particularly those systems which are not maintained in a clean condition and continuously treated with a biocide to control Legionella bacteria, algae and biofilms.

Legionnaires Disease Fact Sheet

Further information can be found at NSW Health.

Singleton Council
PO Box 314 Singleton NSW 2330
Ph: 02 6578 7290