Legionella is the name given to the bacteria which causes legionnaires disease, a potentially fatal form of pneumonia. It can affect anybody, but principally those who susceptible because of age, illness, weakened immune system, smoking, etc.
It is a relatively new discovery but one which has wide ranging implications for many different properties and businesses.
The Legionella bacteria can be found naturally in water courses such as rivers, lakes and reservoirs usually in low numbers.
As they are commonly found in environmental sources they may also be found in engineered water systems such as hot and cold water systems, storage cisterns, calorifiers, pipe work, taps, showers, cooling towers and whirlpool spas.
There is legislation in place concerning the risk of exposure to Legionella bacteria in the form of approved code of practice L8.
It is also covered in the Health and Safety
At Work Act and the COSSH Regulations.
With recent amendments to ACOP L8, effectively all premises with a water system are within the scope of the new ACOP. These could include hotels, schools, nursing homes, guest houses, offices and sports facilities.
Regulatory requirements specify that employers and those responsible for the control of premises should carry out risk assessments on all water systems to establish the risk of proliferation of
legionella bacteria.