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The importance of controlling the risk of Legionnaires’ disease within any occupied building can never be over-stated.

Legionella pneumophila, the bacteria that causes Legionnaires’ disease, occurs naturally within water and therefore all buildings with a water supply can present a risk to the occupants.

The HSE’s Approved Code of Practice L8 ‘the control of Legionella bacteria in water systems’ provides specific guidance on the best way to reduce the risk to the building occupants – a message that is reinforced in the Health and Safety at Work etc. Act 1974. Our tailored Legionella control programmes have been developed in accordance with this legislation, ensuring all our clients receive the most up to date advice and service.

Watermation Ltd approaches the control of Legionella bacteria through a meticulous four stage approach; firstly assessing any potential risks there may be, rectifying any immediate or significant risk areas, ongoing monitoring and sampling and finally any evaluation to ensure the systems are working. The combination of this thorough approach and proactive management makes our Legionella control process extremely effective, thus minimising the risk to the building occupants and ensuring the building adheres to the current legislation.


1. Risk Assessment

The HSE’s ACOP L8 states that every building should have a suitable and sufficient risk assessment undertaken.

In buildings occupied by five or more people the results should be formally recorded. This document should be reviewed or updated regularly or at least every two years. The first step to any water hygiene control programme is to undertake a risk assessment to establish the current site condition and highlight any existing potential risk areas. The risk assessment will look at all aspects of a buildings water services and record the findings with detailed notes, including schematic diagrams and photographic records.

Finally, the risk assessment will provide straight forward recommendations on what actions need to be taken to reduce the risk and ensure compliance with water regulations.


Health and Safety Executive approved (L8) risk assessments are one of the surest ways of reducing the risk of Legionnaires disease in your water systems.
A comprehensive risk survey will look at all aspects of your water system; paying particular attention to problematic areas such as cooling tower, tanks and water systems that may create aerosols.

You will receive comprehensive reports showing any issues & remedial action required, a log book, a comprehensive treatment program, regular inspections and monitoring.

2. Ongoing Monitoring

An integral part of the ACOP’s requirements is the need to undertake regular monitoring and checks on the systems to ensure that they are operating within the guideline parameters.

By using the information gained during the risk assessment process, we can firstly design a bespoke monitoring and testing regime based upon the guideline parameters laid out in ACOP L8.

A site specific water hygiene log book can then be instigated which can be used to record and collate all of the information relating to water hygiene. The upkeep of this log book will ensure your total compliance with current legislation and guidance.

3. Evaluation

Often undertaken on an annual basis, the evaluation of any water Legionella control programme is essential. This ensures the systems instigated are working effectively to help reduce the risk of contamination. This stage provides the opportunity to make any necessary adjustments to the control parameters to ensure total compliance.

watermation Watermation Limited
P.O. Box 116
Stowmarket IP14 3RZ
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