When Was the Last Time You Checked Your Building’s Water System?
For many business owners, facilities managers, and property managers, workplace water systems tend to fade into the background. If the taps are running, showers are working properly, and hot and cold water are readily available, it is easy to assume everything is operating safely and efficiently.
However, beneath the surface, poorly maintained water systems can harbour significant health risks that are not always immediately visible. Without regular monitoring, maintenance, and risk management, these hazards can develop unnoticed and potentially place employees, visitors, and contractors at risk.
One of the most serious concerns is Legionella bacteria, which can cause Legionnaires’ disease, a severe form of pneumonia that can be life-threatening in some cases. Understanding how Legionella develops and taking proactive steps to control it is essential for maintaining a safe working environment and meeting legal health and safety responsibilities.
At City Healthcare, we support businesses in achieving and maintaining Legionella compliance through professional risk assessments and ongoing water hygiene management services.
What Is Legionella?
Legionella is a naturally occurring bacterium that can grow and multiply within man-made water systems when the conditions are right.
The risk increases when water becomes stagnant or when temperatures fall within the range that encourages bacterial growth. The presence of scale, sediment, sludge, rust, and biofilm can further contribute to the problem, providing an ideal environment for Legionella to flourish.
People are typically exposed to Legionella by inhaling fine airborne water droplets, known as aerosols, that contain the bacteria. These microscopic droplets can be generated by a variety of water systems commonly found in commercial, industrial, healthcare, and residential properties.
Common sources of potential exposure include:
- Taps and water outlets
- Hot and cold water distribution systems
- Showers and shower heads
- Water storage tanks
- Cooling towers and evaporative cooling systems
- Any water system capable of producing water aerosols
While Legionella can exist within a water system without causing immediate issues, the consequences of exposure can be serious. Conducting regular Legionella risk assessments and implementing effective control measures can significantly reduce the likelihood of bacterial growth and help organisations fulfil their duty of care.
Routine inspections, monitoring, and proactive water system management are vital for safeguarding building occupants and ensuring compliance with relevant health and safety regulations. By taking a preventative approach, businesses can minimise risk, protect public health, and maintain confidence that their water systems remain safe and compliant.
A risk assessment can vary depending on the nature of the premises, the complexity of the water systems, and how they are used. This is why a suitable Legionella risk assessment is essential, providing a clear understanding of potential hazards and ensuring that appropriate control measures are in place to protect building occupants and maintain compliance with legal responsibilities. A risk assessment can also provide businesses with a clearer understanding of their water systems and the actions required to manage them effectively.
Who Is Responsible for a Legionella Risk Assessment?
Managing Legionella risks is a legal responsibility for anyone who has control of a building’s water systems. This includes employers, landlords, facilities managers, property managers, and other duty holders who are responsible for maintaining safe premises.
It is important to remember that Legionella is not only a concern for large organisations or complex buildings. Any property with a water system can be at risk if conditions allow bacteria to grow and spread.
Premises that may require a Legionella risk assessment include:
- Offices and commercial premises
- Hotels, guest houses, and hospitality venues
- Schools, colleges, and universities
- Healthcare providers and care homes
- Leisure centres, gyms, and sports facilities
- Residential rental properties
- Industrial and manufacturing facilities
The level of risk will vary from one property to another, depending on factors such as the design of the water system, how the building is used, and the condition of the infrastructure. A professional Legionella risk assessment helps identify potential hazards, evaluate the level of risk, and determine the most effective control measures to protect occupants and ensure legal compliance.
The Three Key Principles of Legionella Control
The goal of effective Legionella management is straightforward:
Identify the risk. Assess the risk. Implement the appropriate controls.
A thorough risk assessment provides valuable insight into how a water system operates and highlights any actions required to reduce risk and maintain compliance. It forms the foundation of an effective water hygiene management programme.
Legionella Management Is an Ongoing Responsibility
One of the most common misconceptions is that a Legionella risk assessment is a one-time requirement. In reality, effective Legionella control requires continuous review and management.
Buildings and water systems are constantly evolving. Areas may become vacant or rarely used, occupancy levels can change, pipework may be altered, and equipment may be upgraded or replaced. Any of these changes can affect the level of Legionella risk within a property.
For this reason, Legionella management should be treated as an ongoing part of building safety and compliance rather than a one-off exercise.
Risk assessments should be reviewed whenever significant changes occur to a building or its water systems, and periodically as part of an organisation’s wider risk management strategy. Regular reviews help ensure that control measures remain effective, risks are properly managed, and building occupants continue to be protected.
By adopting a proactive approach to Legionella management, organisations can maintain safer water systems, meet their legal obligations, and reduce the likelihood of preventable health risks.
Why Is a Legionella Risk Assessment Important?
A Legionella risk assessment is designed to identify potential hazards within a building’s water systems and determine the most effective measures for controlling them.
For businesses and organisations, a Legionella risk assessment is much more than a compliance requirement. It plays a vital role in helping to safeguard employees, visitors, contractors, and anyone else who may be exposed to the building’s water systems. By identifying conditions that could encourage the growth and spread of Legionella bacteria, organisations can take proactive steps to reduce risk and maintain a safe environment.
A thorough assessment reviews the design, operation, and maintenance of water systems to identify areas where Legionella may develop. It also evaluates existing control measures and highlights any actions needed to improve the management of water hygiene risks.
Key areas typically examined during a Legionella risk assessment include:
- Water temperatures throughout the system
- Areas where water may become stagnant
- The condition and cleanliness of tanks, pipework, and outlets
- The presence of scale, sediment, corrosion, or biofilm
- Infrequently used taps, showers, and other water outlets
- Current inspection, monitoring, and maintenance procedures
By identifying and addressing these potential risks, organisations can help reduce the likelihood of Legionella exposure, protect building occupants, and demonstrate compliance with their health and safety responsibilities.
Water Temperature
Controlling water temperature is one of the key factors in managing Legionella risk. A risk assessment reviews whether hot and cold water systems are operating within appropriate temperature ranges and are being maintained correctly.
Stagnant Water
Water that remains unused for extended periods can create favourable conditions for bacterial growth. An assessment identifies dead legs, little-used pipework, and other areas where water may stagnate.
Scale and Sediment
The accumulation of scale, rust, and sediment within water systems can provide nutrients and shelter for bacteria. Assessing these conditions helps identify where cleaning or remedial work may be required.
Biofilms
Biofilms are layers of microorganisms that can develop on the internal surfaces of water systems. These environments can protect bacteria and encourage their growth, making them an important consideration during any assessment.
System Design and Condition
The layout, condition, and overall design of a water system can significantly influence Legionella risk. Assessors evaluate components such as storage tanks, pipework, outlets, and associated equipment to identify any issues that may require attention.
What Happens During a Legionella Risk Assessment?
A professional Legionella risk assessment involves a detailed inspection of a building’s water systems to identify potential hazards and assess the effectiveness of current control measures.
At City Healthcare, our Legionella Risk Assessments provide a comprehensive review of water systems within commercial premises. We assess factors including water temperatures, stagnation risks, system cleanliness, biofilm development, and the overall condition of the installation.
The findings are used to identify potential areas of concern and provide practical recommendations to help organisations manage and reduce Legionella risks effectively.
Don’t Leave Legionella Risk to Chance
Facilities managers and business owners already have enough responsibilities to manage without the added worry of water hygiene risks.
A professional Legionella risk assessment provides a clear, structured approach to understanding your legal responsibilities, identifying potential hazards, and implementing appropriate control measures to keep your premises safe.
At City Healthcare, we deliver Legionella Risk Assessment services to businesses throughout the Midlands of England, helping organisations understand, control, and manage risks associated with their water systems.
As an independent, family-run business with more than 27 years of experience in commercial hygiene and facilities services, we provide practical, professional support tailored to your organisation’s needs.
If you’re unsure whether your business requires a Legionella risk assessment, or if it has been some time since your water systems were last reviewed, speak to the City Healthcare Direct team today.
Talk to the City Healthcare team about how best to improve hygiene in your washrooms. Call our friendly team on 0800 542 4009 or email customercare@cityhealthcare.co.uk.
