What is Legionella?
Legionella is a species of bacteria that can cause severe lung infection (Legionnaires’ disease). Legionella bacteria can also cause Pontiac fever. Exposure occurs when people breathe in air-borne water droplets that contain the bacteria. Breeding grounds for legionella include water in potable and non-potable systems with exposure occurring through sources such as showerheads, faucets, air handlers, and water features.