Guidance index

General guidance documents:
Regulation 8 supplies

Training examples (PDF 155KB) and case studies to assist local authorities in the identification of Regulation 8 supplies.

Materials in contact with drinking water

Information note on Regulation 5 (PDF 270KB) (or Regulation 5 (PDF 92KB) in Wales) on the use of products and substances which come into contact with water in private water supplies.

List of approved products for use in public water supplies

Transitional List of approved products for use in private water supplies

Templates and worked examples

The information required to be submitted by local authorities is set out in the following three Annexes:

  • Annex 1 (xls 447KB) : An Excel file containing local authority data
  • Annex 2 (xls 406KB) : Worked example
  • Annex 3 (PDF 210KB) : Worksheet Specification

Notices and worked examples
  • Section 80 template (Word 27KB)
  • Example of a competed Section 80 Notice (Word 25KB) for insufficiency

  • Template for Regulation 18 Notice (England (Word 39KB)) and Regulation 20 Notice (Wales (Word 38KB))
  • Example Regulation 18 Notice for arsenic (England (Word 41KB)) and Example Regulation 20 Notice (Wales (Word 41KB))

Risk assessments

The PWS Information Pack (Word 1.1MB)  can be used to help gather information from private supply relevant person(s) ahead of any planned risk assessment

DWI has produced an Action Plan look up table (PDF 776KB) listing common mitigation measures to aid the risk assessment.

There are two private water supply risk assessment tools  to assist local authorities undertake risk assessments of Regulation 8, 9 and 10 private water supplies.

Sampling manual

To aid local authorities in conducting this duty the Inspectorate has produced a sampling manual which outlines all the required information to ensure regulatory monitoring requirements are met by way of standard best practice.


Page reviewed: 21 May 2018
Page modified: 21 May 2018

Drinking Water Inspectorate