Covid-19 Business Closures – Legionella Control

As many businesses are now closed due to the Covid-19 pandemic or are being used less frequently, we would like to remind you of the Legionella risks in unoccupied/less occupied properties where water can stagnate within water systems.

Water outlets on hot and cold water systems should be used at least once a week to help maintain a degree of water flow and to help prevent water stagnation.

You should consider implementing a suitable flushing regime to manage the risks or other measures such as draining the system if the business is to remain closed for a long period.

Guidance has been produced by European Society for Clinical Microbiology and Infectious Disease for managing Legionella in building water systems during the Covid-19 Pandemic, it is available here;

Further guidance from the Health and Safety Executive is also available here;

Public Health England Food, Water, Environmental Microbiology Services;

  • Important information for organisations that rely on a safe water supply to undertake their business activities (external pdf 546kb)

Leisure, Sports, Swimming and Spa Pool Facilities

In addition, for business offering these facilities we suggest that you follow the procedures within the Pool Water Treatment Advisory Group Code of Practice which is available here:

Contact Us

If you need any further advice, please contact our Environmental Health Team via email at

Last Updated on Friday, May 22, 2020