Safe water in healthcare premises (HTM 04-01)

The design, installation, commissioning, testing, monitoring and operation of water supply systems in healthcare premises.



This Health Technical Memorandum (HTM) gives guidance on the legal requirements, design applications, maintenance and operation of hot and cold water supply, storage and distribution systems in all types of healthcare premises.

The guidance is for:

  • healthcare management
  • water safety groups
  • design engineers
  • estate managers
  • operations managers
  • contractors
  • supply chain businesses

It also provides advice and guidance on the control and management of the risk posed by Legionella, Pseudomonas aeruginosa and other water borne pathogens within a healthcare setting.

Part A covers the design, installation and commissioning.

Part B covers operational management.

Part C focuses on specific additional measures that should be taken to control and minimise the risk of Pseudomonas aeruginosa in augmented care units.

It should be read in conjunction with the HSE’s Approved Code of Practice (L8) and HSG274 Part 2. It is equally applicable to both new and existing sites.

Published 1 October 2006
Last updated 10 April 2017 + show all updates
  1. Supplement D 08: amends to introduction, also to on-site testing and commissioning section to make it easier to test thermostatic mixing valves.

  2. Updated guidance: revised into part A, B and C.

  3. Supplement D08 added.

  4. First published.