Guidance
Principles of water supply hygiene
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.
Technical guidance notes are subject to change from time to time and the readers should check this page for the latest version.
Principles of Water Supply Hygiene [PDF 681 KB]
Principles of Water Supply Hygiene (excluding technical guidance notes) [PDF 394 KB]
TGN 1 - Medical surveillance of personnel [PDF 113 KB]
TGN 2 - Distribution system (new mains and services) [PDF 124 KB]
TGN 3 - Distribution system (repairing mains) [PDF 128 KB]
TGN 4 - Distribution system (renovated mains) [PDF 123 KB]
TGN 5 - Distribution system (abandoned mains and changed status mains) [PDF 116 KB]
TGN 6 - Temporary (overland) mains and services [PDF 120 KB]
TGN 7 - Catchment protection [PDF 146 KB]
TGN 8 - Water treatment (Disinfection) [PDF 222 KB]
TGN 9 - Treated water storage [PDF 130 KB]
TGN 10 - Event and incident management [PDF 155 KB]
TGN 11 - Storage and use of bottled water [PDF 125 KB]
TGN 12 - Tankers, static tanks and bowsers [PDF 127 KB]
TGN 13 - Preparation of chlorine solutions [PDF 120 KB]
TGN 14 - Disposal of chlorine solutions and chlorinated water [PDF 126 KB]
TGN 15 - Installation and maintenance of final water and service reservoir sample points [PDF 122 KB]
TGN 16 - Quality assurance of online water quality monitoring instrumentation [PDF 137 KB]
All TGNs [PDF 452 KB]
