With outbreaks of Legionnaires’ disease still being reported in Britain, and indeed further afield, one risk likely to be at the forefront of the industry’s mind is the spread of the bacteria behind the disease.
Found commonly in water, legionella bacteria multiply where nutrients are available and temperatures are between 20-45°C. Warm standing water is the ideal growing environment; anything cooler than 20°C and the bacteria lay dormant, while anything above 60°C and they do not survive.
Legionnaires’ disease is a potentially fatal type of pneumonia, contracted by inhaling airborne water droplets containing viable legionella bacteria. Such droplets can be created, for example, by hot water systems, atomisers or hydrotherapy baths.