Legionella Risk Assessments

A Legionella risk assessment is a comprehensive survey that systematically examines your premises’ water systems for potential risks posed by Legionella bacteria. These bacteria can multiply in man-made water systems and, if inhaled via contaminated water droplets (aerosols), may cause Legionnaires’ disease – a serious, potentially fatal lung infection.

As required by UK health and safety law and outlined in HSE’s ACoP L8 guideline, the primary goal is to identify and assess the risk from Legionella bacteria in water systems. This water risk assessment involves evaluating your system’s design, operation, and conditions favourable to bacterial growth, such as water temperature and nutrient sources.

Completing this assessment is the crucial first step in any effective water safety plan, providing a clear understanding of your specific risk of Legionella and guiding necessary control measures to protect health.

You can contact our team to discuss your requirements in a no-obligation consultation.

In the UK, the legal duty for conducting Legionella risk assessments is underpinned by the Health and Safety at Work etc. Act 1974 (often referred to as the Safety at Work Act). This Act requires employers and those in control of premises (Duty Holders) to protect the health and safety of employees and others who may be affected by their activities.

Legionella bacteria are considered a hazardous substance under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), mandating the requirement for an assessment of risks and implementation of control measures. The Health and Safety Executive’s (HSE) Approved Code of Practice L8 (ACoP L8) provides specific, practical guidance on complying with these legal duties.

While ACoP L8 is not law itself, it has special legal status; following this best practice guideline demonstrates robust compliance. The Duty Holder is ultimately responsible for ensuring a suitable and sufficient risk assessment is performed and effective risk management is in place to prevent the risk of exposure to Legionella.

In the UK, if you are an employer or someone in control of premises (defined as the ‘Duty Holder’), you have a legal responsibility to assess the risk from Legionella bacteria. This duty is broad and applies to almost all types of businesses and organisations, regardless of size. Key examples include landlords (responsible for domestic properties they rent and commercial property), business owners of all kinds, managing agents, schools, universities, care homes, hospitals, dental practices, hotels, and any facility with man-made water systems. Landlords are legally required to manage this risk.

The requirement for a Legionella risk assessment covers any property with water systems where Legionella could grow and be dispersed as an aerosol. This includes common systems like your hot and cold water system, showers, spa pools, cooling towers, humidifiers, and even smaller installations if they present a foreseeable risk. Understanding your specific obligations as a Duty Holder for the water systems on your premises is a fundamental part of the Legionella control strategy for complying with UK health and safety law and protecting people.

Exposure to Legionella bacteria can lead to a group of illnesses known as legionellosis. The most severe is Legionnaires’ disease, a potentially fatal form of pneumonia caused by these waterborne pathogens including Legionella. Infection is contracted by inhaling tiny airborne water droplets (aerosols) containing Legionella bacteria, often from sources like showers, spa pools, or air conditioning cooling towers where the bacteria have been allowed to multiply.

While anyone can contract Legionnaires’ disease (sometimes referred to as legionnaire’s), certain groups are at significantly higher risk of exposure to Legionella. These include people over 45, smokers, heavy drinkers, those with chronic respiratory or kidney conditions, diabetes, or individuals with an impaired immune system. Due to the serious health implications, especially for these vulnerable groups, preventing the spread of Legionella through robust risk assessments for Legionella and diligent control measures is absolutely critical for ensuring safety.

Our Legionella risk assessment service is a methodical, multi-stage process designed to thoroughly evaluate your water systems in line with UK HSE guidance. We begin with an initial consultation to understand your site and existing water hygiene and management. This is followed by a comprehensive on-site survey conducted by our competent risk assessors, meticulously examining all relevant water assets – from where water enters your property to all points of use.

During the physical inspection, our risk assessors identify and assess the risk, evaluate factors like water temperatures and areas of stagnation, check the condition of your systems, and review any current control measures. All findings are carefully documented. You will then receive a detailed, clear report outlining identified risks, their significance, and practical, prioritised recommendations for effective risk management to help you minimise the risk and manage your water safety. Completing a Legionella risk assessment with us is a thorough process.

Following our comprehensive site assessment, you will receive a detailed Legionella Risk Assessment report. This crucial document serves as a complete record of the survey, our findings, your system’s condition, and the assessed risk level, forming an essential part of your compliance documentation and risk management plan. Typically, your report will clearly identify the water systems reviewed, pinpoint any potential Legionella hazards discovered, and evaluate the risks associated with Legionella bacteria.

It will assess your existing control measures and provide prioritised, actionable recommendations for any necessary remedial works or improvements to your control of Legionella bacteria scheme. The report may also recommend specific testing for Legionella if deemed necessary to further clarify the risk level. To ensure clarity, comprehensive reports often include supporting information such as schematic diagrams of your water systems, relevant photographic evidence, and an overall summary of your compliance status. We don’t issue a generic report; each one is tailored.

A Legionella risk assessment is not a one-off task but a ‘living document’ that must be reviewed regularly to ensure it remains up-to-date and effective. While UK Health and Safety Executive (HSE) guideline (like ACoP L8) doesn’t mandate a fixed “expiry date,” it’s strongly recommended that assessments are reviewed at least every two years. This ensures ongoing vigilance and that your control measures are still appropriate for the identified risk level. However, an immediate review of your Legionella risk assessment is crucial if certain conditions arise.

An assessment may show that conditions have changed, such as modifications to the water system or its use, changes in the building’s occupants (particularly if more vulnerable individuals are present near potential sources of exposure), or if new information about risks or control measures becomes available. A review is also necessary if routine checks (which might include monitoring levels of Legionella) indicate existing control measures are no longer effective, or if a case of Legionnaires’ disease is suspected or identified in connection with your premises.

Choosing AJK Services, a leading Legionella control company, for your Legionella risk assessment means partnering with a trusted provider committed to the highest standards of water hygiene. You can view a selection of our previous projects here. As proud members of the Legionella Control Association (LCA), we strictly adhere to their Code of Conduct, ensuring our service is delivered with competence and integrity. Our risk assessors are highly qualified, experienced, and possess an in-depth understanding of all current UK regulations, including the HSE’s ACoP L8 guideline.

With specific Legionella risk assessment training. We are dedicated to providing exceptionally thorough assessments and meticulously identifying all potential risks within your water systems. You will receive a clear, comprehensive report containing practical, actionable recommendations tailored to your specific needs. With AJK Services, you can be confident in receiving excellent customer service and robust support for the Legionella responsible person in your organisation, helping you effectively manage your Legionella risks and maintain full compliance.

Receiving your Legionella risk assessment report is the first critical step in your risk management strategy; taking appropriate action is next. Your report will provide clear, prioritised recommendations, and implementing these effectively is key to managing identified risks and ensuring compliance. This might involve adjustments to your current water management practices, or in some instances, require specific Legionella Remedial Works to modify systems or address contamination and effectively minimise the risk.

Beyond immediate actions, robust control of Legionella bacteria is an ongoing commitment. This includes establishing and maintaining a regular monitoring programme (e.g., temperature checks, inspections, and potentially periodic Legionella testing) as outlined in your assessment. Ensuring that your staff or any Legionella responsible person receive appropriate Legionella awareness training, potentially through dedicated training courses, is also vital for long-term water safety. AJK Services can support you in developing and implementing these essential ongoing control strategies.

Ready to ensure your property is safe, compliant, and that you’re fulfilling all your UK legal obligations regarding Legionella control? Taking the first step with AJK Services is straightforward and designed to give you peace of mind. If you have any questions about your responsibilities, how we carry out a Legionella risk assessment, the potential cost of a Legionella risk assessment, or specific concerns about your water systems, please don’t hesitate to reach out.

Your initial conversation with our expert team is completely free, with no obligation. We’re here to provide clarity and help you understand your needs. To schedule your comprehensive Legionella risk assessment, or simply to start that initial free discussion, please use the contact form below or click here to get in touch. We look forward to hearing from you.