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Legionellae bacteria are widely distributed in
the environment and can be found in all types of water.
disinfection treatment applied to drinking water is effective at killing
Legionnaires’ disease is an uncommon form of pneumonia caused by
inhalation of the legionella bacterium.
bacteria only become a risk to health where conditions, particularly warm
temperatures, allow them to grow and be released, in large numbers, into the
air in a fine mist of water droplets.
can occur in artificial water systems when poorly designed, installed or maintained.
Examples can include cooling towers, hot and cold water systems and spa pools.
Some people are more susceptible to infection than others.
Risk assessments of such systems for legionellae bacteria are a legal requirement. Where a risk is identified appropriate
controls, preventative treatment and monitoring must be implemented.