Our risk audits are conducted in accordance to the guidelines set out in South African National Standard (SANS 893) Part 1 (Risk management) and Part 2 (The control of Legionella in water systems) and those published by the European ELDSnet (European Legionnaires’ Disease Surveillance Network). For more details please consult the websites www.sabs.co.za and email@example.com
The following are the requirements to implement a Legionella pneumophila risk reduction programme, and as such, these requirements will be audited:
Have one (named) person responsible for Legionella control.
Ensure the designated person is trained in the control of Legionella and that other staff members are trained to be aware of the importance of their role in controlling Legionella.
Keep hot water hot and circulating at all times: 52⁰C to 60⁰C (too hot to put hands into, or under for more than a few seconds). It must leave the hot water plant/system at 60 ºC or more and return at no less than 50 ºC.
Keep cold water cold at all times. It should be maintained at temperatures below 25⁰C (ideally 20ºC)
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.
Keep shower heads and taps clean and free from scale.
Clean and disinfect evaporative cooling towers and associated pipes used in air conditioning systems regularly—at least twice a year.
Clean and disinfect water heaters (calorifiers) once a year.
Disinfect the hot water system with a high level (50mg/L) of chlorine for 2 to 4 hours after work on water heaters and before the beginning of every season; or use appropriate heat shocking.
Clean and disinfect all water filters regularly; every one to three months.
Inspect water storage tanks, cooling towers and visible pipe work monthly. Ensure that all coverings are intact and firmly in place.
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.
Ensure that system modifications or new installations do not create pipework with intermittent or no water flow.
If there is a spa pool (synonymous with whirlpool spas, “Jacuzzis” or spa baths) ensure:
- It is continuously treated with 2 to 3mg/L chlorine or bromine or equivalent and that the levels are monitored at least three times a day.
- Replace at least half of the water each day.
- Backwash the sand filters daily.
- Clean and disinfect the whole system once a week.
Keep daily records of all water treatment readings such as temperature and chlorine concentrations and ensure they are checked regularly by the manager.