What is Legionella?
Legionella bacteria thrive in warm, stagnant water but can survive under a wide range of temperatures (68° to 138°F). These bacteria, which naturally exist in fresh water environments, can accumulate in man-made water systems and cause disease. Legionellosis – or Legionnaire’s’ disease – is contracted when contaminated water is aerosolized (through steam, mist, condensation, etc.) and enters the lungs. In the United States, reported cases of Legionnaires’ disease have increased by 5.5X from 2000 to 2017. Health departments reported about 7,500 cases of Legionnaires’ disease in the United States in 2017.