Legionella Risk Assessment

A Legionella risk assessment is an essential part of managing water safety in any commercial, residential or public building. It helps identify where Legionella bacteria could grow, how people may be exposed, and what steps are needed to control the risk.

Thomson Environmental Services provide professional Legionella risk assessments for a wide range of buildings and water systems. Based at the Surrey Research Park, our experienced Water Quality Engineers work with landlords, property managers, facilities teams, healthcare providers and `the responsible person` to deliver clear, practical and compliant advice.

As experts in all things Legionella, we do more than simply produce a report. We inspect your water systems, assess areas of concern, explain the level of risk and provide straightforward recommendations to help you keep your building safe.


Why Legionella Risk Assessments Matter

Legionella can grow in water systems where conditions allow bacteria to multiply, particularly where water is stored, stagnant or held at temperatures that support bacterial growth. Showers, taps, tanks, calorifiers, pipework and other water system components may all need to be considered as part of a proper assessment.

UK dutyholders, including employers and those responsible for premises, are expected to identify and assess sources of Legionella risk as part of their legal duties. HSE guidance explains that duty holders should identify and assess risk sources, including checking whether conditions could encourage bacteria to multiply.

A professional risk assessment helps you understand whether your current controls are suitable, where improvements are needed, and what ongoing monitoring should be put in place.


What Our Risk Assessments Include

Our Legionella risk assessments are designed to give you a clear understanding of your water system and the actions required to manage risk effectively.

A typical assessment may include:

  • Inspection of hot and cold water systems
  • Review of tanks, outlets, pipework and associated plant
  • Identification of potential stagnation, temperature or system design issues
  • Assessment of current control measures
  • Review of records, monitoring and maintenance procedures
  • Practical recommendations for remedial work or ongoing management
  • Clear reporting for your compliance records

Where required, we can also provide you with water sampling, cleaning and disinfection, monitoring contracts, training and booster pump servicing.


Clear Advice from Legionella Specialists

Managing Legionella compliance can feel complicated, especially for buildings with larger or more complex water systems. Our role is to make the process clearer.

We provide straightforward advice, detailed reporting and practical next steps, so you know what needs doing and why.


Who We Help

We work with a wide range of clients, including:

  • Commercial property owners
  • Facilities managers
  • Landlords and managing agents
  • Offices and workplaces
  • Healthcare and care environments
  • Education sites
  • Residential blocks
  • Industrial and process environments

The Legionella Control Association listing for Thomson confirms their registered service categories include hot and cold water system risk assessment, process and other systems risk assessment, and healthcare risk assessment services.


Based at Surrey Research Park

Thomson Environmental Services is based at the prestigious Surrey Research Park, a recognised location for specialist, technical and professional businesses. From this base, we provide dependable water hygiene and Legionella control services for clients across Guildford, Surrey, the South East and beyond.


Book a Legionella Risk Assessment

If you are responsible for a building, your water systems need to be properly assessed and managed. Thomson Environmental Services can carry out a thorough Legionella risk assessment and provide the guidance you need to remain compliant and protect building users.

Get in touch today to arrange a Legionella risk assessment with our experienced Water Quality Engineers.