Legionella Risk Assessment
BioSweep® UK provides professional Legionella risk assessments to help dutyholders identify, assess and manage risks associated with water systems in line with HSE guidance, including ACOP L8 and HSG274. Our assessments identify potential sources of Legionella growth, evaluate system design and existing control measures, and provide clear, practical recommendations for residential, commercial and institutional settings.
Why a Legionella Risk Assessment is Essential
Legionella bacteria can develop in man-made hot and cold water systems where environmental conditions allow growth. These include:
Stored water tanks and calorifiers
Hot and cold water distribution systems
Showers and spray outlets
Dead-leg pipework and stagnation points
Inadequate temperature control
Scale, corrosion and biofilm formation
Legionnaires’ disease is a potentially fatal form of pneumonia caused by inhaling fine water droplets contaminated with Legionella bacteria.
Water systems should be assessed proportionately according to their design, use and potential risk. In many straightforward residential systems, the assessment may identify a low level of risk requiring only simple control measures.
Legal Duties & Compliance
UK health and safety legislation requires relevant dutyholders to assess and manage the risk of exposure to Legionella. Depending on the premises and water system, responsibilities may include:
Identify and assess sources of Legionella risk
Appoint a competent responsible person
Implement appropriate control measure
Maintain appropriate monitoring and records
Review assessments regularly
Failure to comply can result in enforcement action, fines, or prosecution.
A Legionella risk assessment provides documented evidence of the risks identified and the measures recommended to manage or control them.
Our Legionella Risk Assessment Process
🔹 Full Water System Survey
We conduct a detailed inspection of your water system, including plant, storage, distribution and outlets, to understand system design and identify potential exposure points.
🔹 Risk Identification & Evaluation
We assess conditions known to encourage Legionella growth, including:
Water temperatures between 20–45°C
Stagnation and seldom-used outlets
System modifications or poor maintenance
Inadequate insulation or circulation
🔹 Risk Rating & Prioritised Recommendations
Each issue is risk-rated with practical recommendations to reduce or control risk.
🔹 Structured Risk Assessment Report
You receive a professional report suitable for:
Landlord and property records
Commercial property management
Risk management and control planning
Audit and due diligence
Health and safety record keeping
Benefits Across Sectors
🔹Homes & Rental Properties
Demonstrates due diligence for landlords
Supports management of Legionella risk within water system
Supports management of shared or communal systems
🔹Commercial Premises & Offices
Supports water-system risk management and regulatory responsibilities
Reduces risk in complex water systems
Supports building management and facilities planning
🔹Hotels, Short‑Term Rentals & Education
Supports management of Legionella risk for guests, students and staff
Supports dutyholders in meeting relevant health and safety responsibilities
Provides documented insight for operational teams
🔹Institutional Settings & Managed Facilities
Supports management of water-system risks within care, clinical and managed settings
Supports existing water hygiene and risk-management programmes
Supports governance and audit readiness
Environments We Cover
BioSweep® UK conducts Legionella risk assessments in:
Homes and rental portfolios
Offices and commercial buildings
Hotels, education, and hospitality venues
Institutional and managed facilities
Laboratories, clinics, and care homes
This coverage supports duty holders across a range of property and operational settings.
Why Choose BioSweep® UK
Legionella risk assessments aligned with HSE ACOP L8 & HSG274
Comprehensive inspection and risk control recommendations
Clear, actionable documentation to support risk management and audit requirements
DBS‑checked operatives trained for occupied and sensitive environments
Full RAMS, lone‑worker procedures, and safeguarding awareness
Water sampling available where appropriate, with independent laboratory analysis using UKAS-accredited test methods where applicable
Authoritative Guidance
Our assessments align with:
HSE Approved Code of Practice L8 – The control of Legionella bacteria in water systems
HSE HSG274 Technical Guidance
Health & Safety at Work etc. Act 1974
For further information visit:
Book a Legionella Risk Assessment Today - Professional Legionella risk assessments to support effective water-system risk management
Supporting water safety and Legionella compliance
Where appropriate, Legionella risk assessments are supported by our water sampling services, with independent laboratory analysis using UKAS-accredited test methods where applicable.
Where findings identify a requirement for further action, decontamination services may also be provided where appropriate.