Guidance Notes

• Guidance on the Regulatory Responsibilities of New (Inset) Appointees in relation to Public Water Supplies (PDF 286KB) provides guidance to prospective and newly appointed water companies in respect of the regulatory requirements associated with public water supplies intended for drinking, cooking, washing and food production purposes. It does not apply to private water supplies, "grey waters" or treated waters supplied for industrial processes only.
  Published 2nd March 2010 as mentioned in Information Letter 02/2010 (PDF 49KB)
  
  
• Guidance on the use of Ultraviolet (UV) irradiation for the disinfection of public water supplies (PDF 182KB) provides guidance on issues that water suppliers should take into consideration in the design, operation and monitoring of UV disinfection systems. This guidance is applicable to both existing and new UV installations used for the disinfection of public drinking water supplies.
  
  
• Drinking Water Safety - Guidance to health and water professionals (PDF 5.09MB) is a joint publication by the Drinking Water Inspectorate and the Health Protection Agency which brings together current information and advice on the management of incidents affecting drinking water quality for use by health professionals and members of the water industry.
  Published 15th September 2009, as mentioned in Information Letter 09/2009 (PDF 140KB)
  
  
• Guidance on sampling during adverse weather conditions (PDF 42 KB) Issued 6 February 2009
  
  
• Guidance on the Water Supply (Water Quality) regulations 2000(England) & 2001(Wales) incorporating the Water Supply (Water Quality) (amendment) regulations 2007 (PDF 827KB)    Published 6 October 2008
  As mentioned  in Information letter 10/2008
  
  
• Guidance on the Water Supply (Water Quality) Regulations 2000 specific to N-nitrosodimethylamine (NDMA) concentrations in drinking water. (PDF 79KB)    Published 9 September 2008
  As mentioned  in Information letter 9/2008
  
  
• Guidance on the Notification of Events - Updated 10 August 2009 to incorporate the issue of the new Water Industry (Suppliers’ Information) Direction 2009.  
  As mentioned in Information letter 03/2008
  
  
• A Brief Guide to Drinking Water Safety Plans (PDF 256KB)
  
  
• Guidance on the Water Supply (Water Quality) Regulations 2000/2001 specific to PFOS (Perfluorooctane Sulphonate) and PFOA (Perfluorooctanoic Acid) concentrations in drinking water (PDF 188KB) - Revised 16 October 2009
  as mentioned in Information letter 10/09 (PDF 97KB)
  
  
• Guidance on sample and sample extract stability trials (PDF 169KB) and
  Guidance on sample preservation ad preparation for metal analysis of drinking water (PDF 102KB) - Issue date 22 August 2005
  as mentioned in Information letter 12/2005
  
  
• Code of Practice on technical aspects of Fluoridation of water supplies 2005 - Issue date 11 April 2005
  as mentioned in Information letter 05/2005
  
  
• Guidance on calibration and analytical quality control for residual chlorine measurements - Issue date 24 January 2005
  as mentioned in Information letter 03/2005
  
  
• Common Carriage: Guidance on the drinking water quality aspects - Issue date 24 November 2004
  as mentioned in Information letter 13/2004
  
  

SEMD

• Security and Emergency Measures (Water and sewerage undertakers) Direction 1998 - Notification and guidance (PDF 30KB)
  Revised guidance issued December 2009
  
• Security and Emergency Measures (Water and sewerage undertakers) Direction 1998 - Notification and guidance for Wales(PDF 33KB)
  Revised guidance issued January 2008
  
• Security and Emergency Measures (Licensed water suppliers) Directions for licensed water suppliers: Notification and guidance (PDF 36KB)
  Revised guidance issued December 2009