Your Trusted Partner for Legionella Risk Assessments
If you’re here, there’s a good chance you’re responsible for keeping a building’s water systems safe and compliant - and you know how serious Legionella can be.
You’re in the right place. At Titan Water, we carry out professional Legionella risk assessments for all types of buildings and water systems. Our job is to identify potential risks before they become problems, and to help you stay fully compliant with current health and safety legislation.
We take a practical, evidence-based approach. No scare tactics, no unnecessary testing - just clear, accurate advice from experienced engineers who understand how real systems behave. Whether it’s a small office or a large commercial site, we’ll help you manage Legionella risk with confidence and peace of mind.
Nationwide Service
Reliable Expertise Wherever You Are
Our experienced management team operate from the Titan head office near Liverpool, but while our roots are firmly in the North West, our reach goes far beyond it. Our engineers carry out Legionella risk assessments right across the UK, supported by a trusted network of regional specialists. Whether it’s a care home in Aberdeen, a university campus in the Midlands, or an office complex down in sunny Devon, we’ve been there – and we understand the challenges different sites face when it comes to water safety and compliance.
​
If you’re due an assessment, or simply want to check your current report still meets the latest standards, the team at Titan are always happy to offer clear, honest advice.
What Is a Legionella Risk Assessment?
A Legionella risk assessment is a detailed inspection and evaluation of your water systems to identify potential conditions where Legionella pneumophila bacteria could grow and spread. It’s a legal requirement under the Health and Safety at Work Act and HSE’s ACOP L8 guidance for any premises with water systems that can generate aerosols - such as tanks, calorifiers, showers, or cooling towers.
​
The assessment looks at how your system is designed, operated, and maintained, and highlights any issues that could increase the risk of Legionella contamination. The outcome is a written report that identifies hazards, prioritises control actions, and sets out a site-specific management plan to ensure ongoing compliance.
Key points:
-
Legal compliance: Required for landlords, employers, and duty holders under ACOP L8 and HSG274.
-
Risk control: Identifies areas where water may stagnate or reach temperatures ideal for Legionella growth.
-
Documentation: Provides a clear, auditable record of your water safety management.
​
How Often Should a Legionella Risk Assessment Be Carried Out?
For most buildings, a Legionella risk assessment should be reviewed every two years, or sooner if there’s any significant change to the water system, its use, or building occupancy. The HSE requires that assessments remain “up to date and valid”, so any of the following will trigger a review:
-
System modifications (new tanks, pipework, or layout changes).
-
Changes in building use or occupancy levels.
-
Extended periods of disuse or shutdown (for example, during refurbishment).
-
Evidence of poor control results, such as temperature failures or positive Legionella samples.
Regular reviews ensure that any new risks are identified and managed before they become compliance failures or safety concerns. For high-risk environments such as healthcare, social care, or leisure facilities, assessments and monitoring should be even more frequent and closely managed.
What Does a Legionella Risk Assessment Involve?
A professional Legionella risk assessment follows a structured process to ensure nothing is missed. Here’s what’s typically included:
-
Site survey and inspection – A physical inspection of all water systems, tanks, outlets, and plant equipment.
-
Temperature profiling – Measuring temperatures at representative points to confirm systems are operating outside Legionella growth ranges.
-
System schematic – Creating or updating a site drawing that maps all water assets and flow paths.
-
Risk evaluation – Identifying where water could stagnate, where temperatures may be inadequate, or where materials may support bacterial growth.
-
Management review – Checking existing control measures, monitoring routines, records, and competence of responsible persons.
-
Report and recommendations – Issuing a full written report with risk ratings, control actions, and compliance advice.
Most Legionella risk assessments can be completed in a single site visit, with the final report delivered within a few working days. The key is a thorough, practical inspection by a competent assessor who understands both the legislation and real-world water system operation.
Explore Our Full Range of Services
Case Studies
Want to learn more about the kind of work we do? Well you're in luck, as our 'Case Studies' pages are the perfect way to explore some of the 700+ projects we deliver every year, offering a glimpse into the challenges we've faced and the innovative strategies our team have employed to deliver excellence for our customers.
Our Clients
Appointed on our reputation, retained on our results!
With over 75 years of water management experience, Team Titan have become trusted partners to some of the UK's leading corporate brands.
_edited.png)
