Health Technical Memorandum (HTM) 2040 provides recommendations, advice and guidance on controlling legionellae in healthcare premises. It is applicable to new and existing sites, and is for use at various stages during the inception, design, upgrading, refurbishment, extension and maintenance of a building.

This volum operational management considers aspects of preventing and controlling legionallae. It also contains information on the operation, maintenance and cleaning of evaporative cooling towers.
1.- Scope
2.- Introduction to risk assessment and monitoring
3.- Operational considerations
4.- Cold water systems
5.- Hot water services
6.- Evaporative cooling towers
7.- Cleaning and desinfection procedures
8.- Air-conditioning and mechanical ventilation
9.- Other operational considerations
10.- Risk assessment