Legionella is a type of bacteria which occurs naturally in water sources but can multiply and colonise artificial water systems, e.g. cooling towers, evaporative condensers, hot and cold water systems, spa pools.

If the Legionella bacteria are expelled out of these water systems through taps or showers and then ingested they can cause illness, e.g. Legionnaire’s disease.

Employer responsibilities

If you are an employer you have responsibilities to protect your employees, visitors and customers from the risk posed by Legionella bacteria.

As an employer or person in control of premises you must understand how to:

  • Identify and assess sources of risk
  • Manage any risks
  • Prevent or control any risks
  • Keep and maintain the correct records
  • Carry out any other duties you may have.



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