1. Have one named person responsible for legionella control.
2. Ensure the named person is trained in control of legionella and other staff are trained to be aware of the importance of their role in controlling legionella
3. Keep hot water hot and circulating at all times: 50 oC - 60oC (too hot to put hands into for more than a few seconds)
4. Keep cold water cold at all times. It should be maintained at temperatures below 25oC
5. Run all taps and showers in guest rooms for several minutes at least once a week if they are unoccupied and always prior to occupation.
6. Keep shower heads and taps clean and free from scale
7. Clean and disinfect cooling towers and associated pipes used in air conditioning systems regularly - at least twice a year
8. Clean and disinfect water heaters (calorifiers) once a year
9. Disinfect the hot water system with high level (50mg/l) chlorine for 2-4 hours after work on water heaters and before the beginning of every season
10. Clean and disinfect all water filters regularly - every one to three months
11. Inspect water storage tanks, cooling towers and visible pipe work monthly. Ensure that all coverings are intact and firmly in place
12. Inspect the inside of cold water tanks at least once a year and disinfect with 50mg/l chlorine and clean if containing a deposit or otherwise dirty
13. Ensure that system modifications or new installations do not create pipework with intermittent or no water flow
14. If there is a spa pool (also known as whirlpool spas, "Jacuzzis", spa baths) ensure that:
It is continuously treated with 2-3mg/l chlorine or bromine and the levels are monitored at least three times a day
At least half of the water is replaced each day
Sand filters are backwashed daily
The whole system is cleaned and disinfected once a week
Daily records of all water treatment readings such as temperature and chlorine concentrations are kept and ensure they are checked regularly by the manager.

15.Inspect and thoroughly clean cooling towers and evaporative condensers at least once a year.Add a disinfectant, such as chlorine, into cooling towers and other water reservoirs.

16.Remove any algae and accumulated scale from air and water handling systems.

17.Air filters should be examined, cleaned and/or replaced periodically and tested for leaks.

18.Fresh air intakes should not be built close to cooling towers since contaminated aerosols may enter the ventilation system.Cooling towers should be positioned so the drift or evaporate does not enter the fresh air intake.