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Legionella.io

HSE · 4th edition (2013)

ACoP L8

Legionnaires' disease: the control of legionella bacteria in water systems

Reference last checked 27 June 2026

What it is
An Approved Code of Practice. It has special legal status: follow it and you are normally doing enough to comply; depart from it and, in a prosecution, you must show you achieved control another way.
Who it binds
Duty holders (employers and those in control of premises) under the Health and Safety at Work etc. Act and COSHH.
What it covers
The duties: identifying and assessing risk, appointing competent people, a written scheme of control, monitoring, records and review.
Key references
Made under the Health and Safety at Work etc. Act 1974 and COSHH 2002; carries Approved Code of Practice legal status.
Edition
4th edition (2013)

Our explainers

Editions and clause references are confirmed against the publisher on the date shown; always check you are reading the current version. Nothing here is legal advice. See the control-parameters reference for the numbers, and all standards.