Legionella, a lethal bacterium thriving in water systems, poses a grave risk to UK businesses. Neglecting its presence can lead to the deadly Legionnaires’ disease. Preventing this threat demands vigilant maintenance, thorough risk assessments, and robust water treatment to ensure safety for all within business premises.
What is a Legionella Risk Assessment?
A comprehensive Legionella risk assessment is conducted by proficient experts to identify deviations from compliance that elevate the susceptibility to Legionella bacteria proliferation. This assessment serves as a cornerstone in devising tailored measures essential for upholding optimal water safety protocols within your organisation.
Mandated by legal statutes, Legionella risk assessments constitute an imperative obligation for all entities possessing water systems. These assessments play a pivotal role in mitigating the potential transmission of the severe Legionnaire’s disease to both personnel and clientele through the inhalation of contaminated water vapours.
In accordance with the directives outlined in the Approved Code of Practice (ACoP) L8, it is imperative to undertake a comprehensive and judicious Legionella Risk Assessment. This assessment is designed to meticulously recognise and evaluate the spectrum of exposure risks stemming from water systems situated on your premises.
Who should arrange Legionella Water Testing?
- The Employer
This pertains to situations where the risk is posed to either the employees under their supervision or other individuals affected by their operations. - Self-employed individuals
In cases where there exists a risk to themselves or others due to their activities, they are deemed responsible. - The Individual overseeing premises or systems linked to work
This applies when the risk emerges from systems within a structure. For instance, if a building is leased to tenants and the landlord retains maintenance responsibility, they assume this role.
It’s noteworthy that premises equipped with hot and cold-water systems, cooling installations, showers, spa pools, or any equipment containing water inherently carry a reasonable risk of Legionella contamination.
Each business or organisation is required to routinely conduct a comprehensive risk assessment, which encompasses water testing as well. The individual designated as the ‘duty holder’ bears the responsibility of ensuring the proper arrangement and execution of the risk assessment. Typically, the accountable party falls within the following categories:
What does Legionella Water Testing involve?
In essence, the process entails a qualified plumbing engineer evaluating your water system, its quality, and treatment methods. The engineer checks for Legionella bacteria in water samples and assesses how water is stored and used on the premises. This comprehensive assessment ensures the safety of your water supply.


