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Early identification of legionella symptoms remains a critical frontline defence for building managers as new data highlights a significant rise in infections across Europe. Following a sharp increase in recorded cases, health authorities are urging dutyholders to remain vigilant regarding water system maintenance and the health of building occupants.
Recent data released by the European Centre for Disease Prevention and Control (ECDC) has confirmed that Italy now leads Europe in the number of reported cases of Legionnaires’ disease. The findings have sparked renewed debate among UK health and safety professionals regarding the risks posed by international travel and the potential for similar trends to emerge domestically if water management standards are allowed to slip.
The report underscores a worrying upward trajectory in infections, which is often attributed to a combination of ageing infrastructure, changing weather patterns, and inconsistent monitoring regimes. For those managing UK assets, the European figures serve as a stark reminder that Legionella bacteria do not respect borders, and the risk of an outbreak is a constant operational threat that requires proactive management.
Legionnaires’ disease, a severe form of pneumonia, is caused when individuals inhale aerosolised water droplets containing the bacteria. While the disease is not contagious between humans, the environmental risk is pervasive in complex plumbing systems, cooling towers, and even decorative water features. For employers and landlords, the priority is often on the technical aspects of control—temperature monitoring and flushing—but the ability to recognise the early signs of illness is equally vital for workplace safety.
Recognising legionella symptoms in the workplace
The clinical progression of the infection can be deceptive, often starting with general malaise that mimics other seasonal illnesses. Initial legionella symptoms typically include a high fever, chills, and a persistent cough. Because these signs overlap with common flu or even Covid-19, cases can often go undiagnosed in the early stages, which is particularly dangerous for vulnerable individuals or those with underlying respiratory conditions.
As the infection takes hold, patients may experience muscle aches, headaches, and significant fatigue. In more severe instances, the bacteria affect the digestive system, leading to nausea and diarrhoea, or cause chest pain and shortness of breath as the pneumonia develops. For a responsible person or facilities manager, being aware that a cluster of staff or tenants are reporting these specific issues can be the first indication of a systemic failure in a building’s water safety plan.
The ECDC’s focus on Italy provides a case study in how environmental factors influence risk. Higher ambient temperatures can make it more difficult to keep cold water systems below the 20°C threshold where the bacteria remains dormant. In the UK, recent heatwaves have presented similar challenges, forcing compliance teams to rethink their insulation strategies and the frequency of their temperature checks.
From a compliance perspective, the duty to manage Legionella is clearly defined under the Health and Safety at Work etc. Act 1974 and the COSHH Regulations. The HSE’s ACoP L8 provides the framework for what is expected, but the Italian data suggests that even with regulations in place, the practical application of risk assessments is where many organisations fall short. It is not enough to have a shelf-copy risk assessment; it must be a living document that accounts for changes in building occupancy and external environmental stressors.
For UK businesses with employees who travel frequently to high-risk areas like Italy, there is also a secondary duty of care to consider. If an employee returns from a business trip and begins to exhibit legionella symptoms, the employer should be prepared to advise them to seek medical attention immediately, mentioning the possibility of exposure. This prevents the infection from being misdiagnosed as a standard chest infection, which might be treated with the wrong type of antibiotics.
The practical implications for facilities managers are clear: the focus must remain on the “dead legs” and infrequently used outlets within a property. When occupancy levels fluctuate—as they have in many commercial offices post-pandemic—the risk of stagnation increases. Stagnant water, combined with temperatures between 20°C and 45°C, creates the perfect breeding ground for the bacteria to colonise and eventually reach the showerheads or taps where aerosols are created.
Regular sampling and laboratory analysis remain the gold standard for verifying that control measures are working. However, the surge in European cases suggests that monitoring should perhaps be more frequent in buildings with a high volume of transient visitors or those housing individuals with increased susceptibility. Vigilance is especially important during the summer months when water temperatures in storage tanks can easily creep into the danger zone.
Ultimately, the rise in cases across the continent serves as a wake-up call. While technical compliance with L8 and HSG274 is the legal baseline, the human element of risk management cannot be ignored. Ensuring that staff are aware of how legionella symptoms present is a low-cost, high-impact addition to any health and safety induction or wellbeing policy.
The ECDC report reflects a broader trend of increasing environmental health risks that require a more sophisticated response from property professionals. As we move into an era of more extreme weather and evolving building usage, the old “check the box” approach to water hygiene will no longer be sufficient to protect occupants and keep organisations on the right side of the law.
