Legionellosis is the collective term for diseases caused by legionella bacteria including the most serious: Legionnaires’ disease.
Any water system with the right environmental conditions can be a source for Legionella bacterial growth.
There is a reasonable foreseeable Legionella risk within your water system if it:
- Contains water with a temperature between 20°C and 45°C
- Creates and/or spreads breathable droplets, e.g. aerosol created by cooling towers or water droplets
- Stores and/or re-circulates water
- Is likely to contain a source of food for the organism, e.g. presence of sludge, scale or fouling