Importance of Legionella Checks

Published: 6 May 2021

Following the easing of COVID 19 lockdown restrictions businesses will need to prepare to ensure that returning guests are not exposed to risks from unmanaged water systems.

During the lockdown period numerous office spaces, hotels, bed and breakfasts and other accommodation venues have been closed to the public, meaning that there has been a significant drop in the use of plumbing within these buildings.

Large buildings such as these are at an increased risk of Legionella contamination due to the large complex water supply systems. Due to the large complex systems this means that the bacteria can spread much faster than in household water systems.

Where water systems are not used frequently or managed correctly it can result in the growth of Legionella bacteria.

There are several basic controls that can be applied when managing the risk of legionella contamination.

  • Have a Legionella risk assessment completed by a competent assessor
  • Reduce the amount of water held in storage
  • Monitor and maintain the hot and cold water temperature –(cold< 20°C, hot >50°C)
  • Flushing of little used outlets
  • Removal of dead legs
  • Water treatment for storage tanks
  • Water sampling and testing to verify the system is free from Legionella
  • Disinfection and descaling of showerheads
  • Maintain a logbook to demonstrate the checks are in place and that the risk is being managed correctly

In preparation for reopening, businesses should consider the following:

  • Is the legionella risk assessment up to date?
  • Have all storage tanks been sampled and tested within the past 3 months?
  • Are all outlets dispersing water at the correct temperature?
  • Have all outlets been flushed through?
  • Have all showerheads been disinfected and descaled?

For advice and support contact the CSC team on 01761 235604 or email us

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