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How often should a care home carry out Legionella testing?
Under the HSE's L8 Approved Code of Practice, care homes are required to carry out a formal Legionella risk assessment at least every two years — or whenever there is reason to believe it may no longer be valid.
In addition, water temperature monitoring should be carried out monthly (sentinel outlets) with a full temperature survey at least annually. TMV servicing is typically annual.
HSE L8 ACOPHSG274 Part 2
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