16/06/11
This document sets out the principles to be considered by water undertakers in drawing up operational procedures for maintaining safe and wholesome drinking water supplies with specific focus being given to hygiene.
Principles of Water Supply Hygiene December 2010
This document updates the previous version published in April 2010. Technical guidance notes are subject to change from time to time and the readers should check this page for the latest version.
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Current Technical Guidance NotesLate updated: February 2012
TGN 2 Distribution system (new mains and services)
TGN 3 Distribution system (repairing mains)
TGN 4 Distribution system (renovated mains)
TGN 5 Distribution system (abandoned mains and changed status mains)
TGN 6 Temporary (overland) mains and services
TGN 7 Catchment protection
February 2012
TGN 8 Water treatment (Disinfection)
TGN 9 Storage of treated water
TGN 10 Event and incident management
TGN 11 Storage and use of bottled water
December 2011
TGN 12 Tankers, bowsers and static tanks
