Did You Know...?How do Legionella bacteria enter the water system of a building? Legionella bacteria are widespread within the natural water environment (rivers, lakes, ponds and reservoirs) and can be found in soils and mud. Legionella can live and reproduce within certain protozoa (intracellular parasite), such as amoeba, and is commonly found within biofilm growing inside a building’s plumbing. This ability to live within biofilm and as an intracellular parasite, grants the bacteria protection from traditional water disinfection treatments such as chlorination. Legionella can move from municipal water systems into a building’s hot and cold water pipes, where, given suitable conditions, it can form biofilm from which the bacteria may be released from taps, showerheads and other points of discharge. (This information is provided by Public Health Ontario).
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