Where does Legionella bacteria come from and what causes it to grow?
Legionella bacteria are naturally found in the environment, usually in ponds, streams and reservoirs. Small but not dangerous numbers can be found int the hot and cold supply.
Poor temperature control within a water system, deadlegs in pipework and taps and showers that are infrequently used and not regularly flushed, can cause the bacteria to grow very quickly. At this point, there is a real risk of people contracting Legionnaires’ Disease.