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Legionella Testing

UK-wide Legionella water sampling and testing services to help detect the presence of Legionella bacteria and provide assurance that your control measures remain effective. 

When should you consider Legionella testing?

Legionella testing is not always required as a routine measure for every hot and cold water system. However, sampling may be recommended where the risk assessment, written scheme of control or monitoring results indicate that further checks are needed.

Risk assessment recommends sampling

 Your Legionella risk assessment should identify whether sampling is appropriate and where samples should be taken, based on the system, level of risk, user vulnerability and existing control measures. 

Control issues are identified

Sampling may be recommended where monitoring records or non-conformances suggest control measures may not be working as intended, such as repeated temperature issues, missed maintenance or unresolved actions. 

Higher-risk sites
or users

Testing may be considered for sites with vulnerable users, complex water systems or higher-risk areas where additional assurance is needed to support ongoing Legionella control.

Follow-up testing is required

Further testing may be needed after a positive result, remedial works, disinfection, system changes or recommissioning to help assess ongoing control.

Need advice on Legionella Sampling?

Our team can help you review your risk assessment, monitoring records and site requirements to determine whether sampling is appropriate and where samples should be taken.
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Why choose BrodexTrident for your Legionella testing?

Risk-based sampling approach

We use the risk assessment, written scheme, monitoring records and site conditions to help identify whether sampling is appropriate and where samples should be taken.

Sampling in accordance with BS 7592

Samples are collected in accordance with BS 7592, the British Standard for sampling Legionella bacteria in water systems.

Independent UKAS-accredited laboratory analysis

Samples are analysed by an independent UKAS-accredited laboratory, providing reliable results to support your compliance records.

Clear reporting and follow-up support

We provide clear results and can advise on follow-up actions, further investigation, remedial works or re-sampling where Legionella is detected.

What's included in Legionella testing?

Sampling point review

We review available risk assessment, monitoring and site information to help identify suitable sampling locations.

Water sample collection

Samples are collected from agreed outlets or system points in accordance with BS 7592.

Laboratory analysis

Samples are submitted to an independent UKAS-accredited laboratory for analysis to detect the presence of Legionella bacteria.

Results reporting

Results are provided clearly to support your water hygiene records and ongoing control measures.

Follow-up support

Where Legionella is detected, we can advise on further investigation, remedial actions and re-sampling where required.

Request a Quote

Whether you need one-off Legionella sampling at a single site or routine testing across multiple UK locations, our team can help arrange appropriate sampling and clear reporting. 
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Case Study - Legionella Testing

Sampling & Chlorination for James Mercer Group

BrodexTrident were tasked with clean and disinfection of 7 seclusion rooms, in Ashworth High-Security Hospital, that had been refitted. This had to be carried out over a period of 4 months with high flexibility to book in the work on short notice to meet strict deadlines.

The James Mercer Group is one of BrodexTrident's continuously returning clients, that have trusted them with being their preferred local supplier.

Legionella Testing FAQs

Is Legionella testing a legal requirement?

Legionella testing requirements depend on the type of water system, the level of risk and the findings of the Legionella risk assessment.

For many standard hot and cold water systems, routine Legionella testing is not always required. However, sampling may be recommended where control measures are in doubt, monitoring results indicate an issue, or testing is identified within the written scheme of control.

Some specialist or higher-risk systems may have more specific sampling requirements, which should be considered in line with the relevant guidance and risk assessment.

Want to learn more about Legionella testing requirements?