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Legionella.io

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Risk assessment review-due calculator

When is your Legionella risk assessment due a review? Enter the last assessment date and tick anything that has changed. There is no fixed legal interval — review is driven by change — but two years is a common default when there is no reason to think it has changed.

Has anything changed since then?
Two years is practice, not law

UK guidance does not set a fixed review interval. A review is driven by change — to the water system, its use, the people exposed, or evidence that controls are not working. The two-year default used here is common practice for assessing whether anything has changed; it is not a statutory deadline. Your own risk assessment may set a shorter period.

Planning aid, not a substitute for a competent, site-specific risk assessment. Source:HSE — what you must do.