LEGIONELLA RISK ASSESSMENTS
Legionella are ubiquitous in the environment, so when conditions are optimal for growth any aerosolisation of the water could lead to exposure. Favourable conditions are associated with factors such as environmental temperatures between 25 and 65⁰C, stagnant water and bio-films.
Stagnancy may result from low water flow within reticulated water systems having "dead-legs" from the main ring, or a storage tank.