Legionella Testing Services in the UK
Legionella Testing by Experts – Stay Safe and Compliant
If your legionella risk assessment or routine monitoring shows a need for testing, Dantek Environmental is here to guide you every step of the way.
We provide expert advice on collecting water samples, then coordinate fast, accurate analysis through our UKAS-accredited laboratories. You’ll receive certified results and full documentation to support your compliance requirements.
Do You Need Legionella Testing? Here’s When It’s Essential
Legionella testing isn’t always required as part of routine monitoring, but certain risk factors mean you must take action. At Dantek, we help businesses identify when testing is essential – and ensure it’s done to the highest standards.
You may need to test for Legionella if:
- Your Legionella Risk Assessment identifies a need for testing
- You’re unsure if current control measures are effective
- The system has been treated with biocide
- There are issues with temperature control or disinfectant levels
- The building houses vulnerable occupants (e.g. hospitals, care homes)
- An outbreak of legionellosis has occurred or is suspected
- You suspect low usage, water stagnation, or structural risks (e.g. dead-legs, heat loss, crossflow)
Unsure if you meet any of these criteria? Contact our experts for advice.
If Legionella testing is required, Dantek offers two simple options:
– We’ll send a qualified technician to collect your samples
– Or, if you prefer, we’ll guide you through the DIY collection process
All testing must follow BS7592: Sampling for Legionella Bacteria in Water – the official UK guidance. Samples are required from both hot and cold-water systems, and the number will depend on your system’s size and complexity.
We’ll provide full instructions, including:
- Where to take each sample from
- How to label samples correctly (location, temperature, pre/post-flushing)
Once collected, your samples are sent to a UKAS-accredited laboratory for analysis.
As soon as results are available, we’ll notify you of any positive or negative findings – and supply a certificate of compliance for your records.
If your Legionella test result is positive, don’t worry – Dantek will guide you through every step.
First, we’ll recommend a resample to confirm the presence of bacteria. If a second test also comes back positive, we’ll help you take immediate and appropriate action based on the severity of contamination.
Depending on the result, we may advise you to:
- Review and improve your control measures
- Update your Legionella risk assessment to identify vulnerable areas
- Perform a full system disinfection if required
After remedial action, ongoing retesting is essential to verify that your water system is safe and compliant. We’ll support you through the monitoring process to ensure control measures are effective and sustainable.
Need urgent advice? Contact the Dantek team.
Is Legionella testing a legal requirement in the UK?
Yes, Legionella testing and risk assessment are legal requirements in the UK under health and safety laws such as the Health and Safety at Work Act and COSHH regulations. Landlords and businesses must ensure their water systems are safe and properly managed to prevent Legionella bacteria growth.
Do I legally need a Legionella risk assessment?
Yes, a Legionella risk assessment is a legal requirement for landlords, employers, and property managers in the UK. You must identify and control the risk of Legionella in your water systems to remain compliant with HSE guidelines (L8 & HSG274).
How much does a Legionella test cost?
The cost of Legionella testing in the UK varies depending on the size of the property, number of water outlets, and sampling requirements. Professional Legionella testing ensures accurate results, legal compliance, and proper documentation.
Do I legally need a Legionella risk assessment?
Yes, a Legionella risk assessment is a legal requirement for landlords, employers, and property managers in the UK. You must identify and control the risk of Legionella in your water systems to remain compliant with HSE guidelines (L8 & HSG274).
Who needs Legionella testing?
Legionella testing is required for landlords, commercial property owners, employers, facilities managers, and duty holders responsible for water systems. Anyone managing a property with water systems has a legal responsibility to control Legionella risk.
What are the responsibilities of a landlord regarding Legionella?
Landlords are legally required to carry out a Legionella risk assessment, maintain safe water systems, control bacterial growth, and keep records of any inspections or testing. This ensures tenant safety and compliance with UK regulations.
How often is Legionella testing required?
Legionella testing frequency depends on the level of risk in the property. High-risk environments such as care homes, hotels, and commercial buildings require more frequent testing, while low-risk residential properties may only need periodic reviews.
Who can test water for Legionella?
Legionella testing should be carried out by trained and competent professionals using accredited laboratories. Choosing a qualified Legionella testing company ensures compliance with UK standards and accurate reporting.
Can a plumber carry out Legionella testing?
Most plumbers are not qualified to perform Legionella risk assessments or accredited water sampling. Legionella testing should be completed by specialists with the correct training, certifications, and laboratory access.
What is the British Standard for Legionella testing?
Legionella control in the UK follows the HSE Approved Code of Practice L8 and HSG274 guidelines. These outline how to manage water systems, conduct Legionella risk assessments, and carry out testing safely and effectively.
Does Legionella come under COSHH?
Yes, Legionella bacteria are covered under the Control of Substances Hazardous to Health (COSHH) regulations. Employers and duty holders must assess and control the risk of exposure to Legionella in water systems.