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0345 600 3 600

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customer.services@wessexwater.co.uk
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Water supply and sewerage

0345 600 4 600

Monday to Friday, 8am to 6pm (emergencies only at other times)

operational.enquiries@wessexwater.co.uk
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  • Legionella

    Legionellae bacteria are widely distributed in the environment and can be found in all types of water.

    The disinfection treatment applied to drinking water is effective at killing legionella bacterium.

    Legionnaires’ disease is an uncommon form of pneumonia caused by inhalation of the legionella bacterium.

    These 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.

    This 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.

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