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Legionella Risk Assessment

Modern Tap

What is Legionella?


Legionella is a bacteria that causes legionellosis, including Legionnaires' disease and Pontiac fever, which are pneumonia-type illnesses. The severity of these illnesses can range from mild flu-like to more severe illness when contracted.

The legionella bacteria naturally occurs and can be located in water courses, soils, compost and other aquatic conditions.

The bacteria can rapidly grow in ideal, nutritious environments when left untreated or irregularly maintained.

Legionella can infect the human body via inhaling contaminated aerosols (water droplets).

What is a Legionella Risk Assessment and When is One Needed?


Landlords (or other duty holders) have a legal duty to assess and control the risk of exposure to legionella within a property.

A Legionella Risk Assessment will generally cover all water systems in a property (residential, commercial, public etc.)


The assessment identifies potential hazards and the level of risk, the people at risk and the control measures to put in place to minimise risk. The assessment records findings and reviews the assessment when needed.

It is recommended that landlords have a Legionella Risk Assessment carried out every two years; before a new tenancy begins or when there have been significant changes to the property's water system(s).

To enquire about ordering a Legionella Risk Assessment, please contact us.