Legionella Risk Assessment
Ensuring safe water systems for landlords and businesses. Fully compliant assessments with clear, actionable reports.
Fixed Pricing
From £99.00
Compliance
HSE Approved
"The process was straightforward and the report was extremely detailed."
— David R., Landlord
48h
Report Turnaround
Legal
HSE Compliance
Safe
Water Systems
£99
Starter Price
Water Safety
"Regular assessments are the only way to ensure your water systems aren't breeding grounds for bacteria."
Definition
What Is a Legionella Risk Assessment?
A Legionella risk assessment is a systematic examination of a property's water systems to identify potential risks of Legionella bacteria exposure. Legionella can grow in man-made water systems like cooling towers, hot and cold water tanks, and plumbing systems when the conditions are right.
The assessment involves a physical inspection of the premises, checking for stagnation, temperature levels, and the overall condition of the water system. The goal is to implement control measures to mitigate the risk of Legionnaires' disease.
Focus
Prevention & Control
Outcome
Compliance Certificate
The Law
Do You Legally Need a Legionella Risk Assessment?
Legal Requirement
Under the Health and Safety at Work etc. Act 1974 and the COSHH regulations, employers and those in control of premises (like landlords) have a duty to identify and assess sources of risk.
Regulatory Expectations
The HSE's L8 Approved Code of Practice (ACOP) specifies that duty holders must follow these guidelines to remain compliant with the law and avoid severe penalties.
Risk-Based Approach
Even for small residential properties with low-risk systems (like standard combi-boilers), a simple but documented assessment is required to demonstrate management of the risk.
Health Risks
What is Legionnaires' disease?
Legionnaires' disease is a severe form of pneumonia caused by the Legionella bacteria. It is contracted by inhaling small droplets of water (aerosols) suspended in the air which contain the bacteria.
High Mortality Rate
Legionnaires' disease is fatal in about 1 in 10 healthy individuals and can be much higher in vulnerable groups.
Vulnerable Groups
People over 45, smokers, heavy drinkers, and those with underlying health conditions are at higher risk.
Legal Obligations
Landlords & Legionella Compliance
Landlords of residential properties have a duty of care to their tenants. You are legally required to ensure the property is safe and does not pose a health risk.
- Periodic risk assessments must be carried out.
- Tenants must be informed of any control measures (e.g., flushing showers after absence).
- Water temperatures must be checked regularly where appropriate.
- Stagnation points should be identified and removed.
Fixed Price Landlord Assessment
Our flat-fee service includes everything you need to stay compliant.
Which Water Systems Must Be Covered?
The assessment must include any system where water is stored or used and which could allow the bacteria to grow or be dispersed as an aerosol.
Water tanks
Cold water storage tanks and expansion vessels.
Hot Water Cylinders
Calorifiers and heaters where water is kept above 60°C.
Outlets & Showers
Taps, showerheads, and any points of use that create spray.
Dead-Legs
Redundant pipework where water can stagnate for long periods.
What Happens During a Legionella Risk Assessment?
Visual Inspection
An assessor will inspect every water outlet, tank, and boiler to look for signs of scale, corrosion, or contamination.
Temperature Testing
Calibrated thermometers are used to check water temperatures at sentinel points (furthest and nearest outlets).
Schematic Survey
The assessor will map out the property's water system to identify areas of potential stagnation (dead-legs).
Risk Factors To Look For
Temperature
Water stored between 20°C and 45°C is the perfect environment for bacteria growth.
Stagnation
Low usage or dead-end pipes allow bacteria to multiply undisturbed.
Contaminants
Sludge, rust, or biological material in water tanks acts as a food source.
Water Spray
Showers or spray taps provide the aerosol needed for bacteria to be inhaled.
Workflow
Our Legionella Assessment Process
Booking
Select Your Date
Inspection
Full System Check
Analysis
Temp & Flow Testing
Reporting
Report Generation
Certification
Certificate Issued
Legionella Control Measures
Common recommendations to reduce risk:
Pricing Guide
What Affects the Assessment Cost?
Property Type & Size
Larger properties with more water outlets take longer to inspect and require more data points.
Complexity of System
Commercial sites with cooling towers or multiple storage tanks have higher assessment requirements.
Location
We offer fixed pricing for London inner and outer zones, with no hidden travel fees.
Frequency
When Should You Redo the Assessment?
While there is no fixed legal renewal date, the HSE recommends reviewing your assessment every 2 years or if:
Book in London
Need a Legionella Risk Assessment today? We have assessors available across all London boroughs.
Call To Book
0800 123 456