DWI website: Help

Site audience and purpose

This site is intended to cover the information needs of many different potential audiences - the general public, water companies and other stakeholders. Local Authorities and Health Authorities, manufacturers of products for the water industry, the press, and the academic community with an interest in research. It is structured to present simple information first, with an indication of more detail further into the site.


We welcome any feedback and suggestions on what you would like us to publish on the site, or on any technical problems you may have with the site. Please e-mail DWI Enquiries .

Site navigation

Since there is a large amount and wide variety of information on our site, we recommend using our A-Z index as an aid to finding the information you want.

Page layout - finding your way around; printing

Most pages on the site are in a standard format, similar to the page you are looking at now. This has been tested on a variety of browsers and platforms. It is designed to display best with your monitor set at a screen resolution of 1024x768 pixels, but should generally display without difficulty at lower computer screen resolutions.

On many pages you will see a navigation section under the DWI  logo, showing you where you are within the hierarchy of the site, and providing links back up to more general pages in the same area. For example:

You are here: Homepage > Consumers > Advice leaflets

The left hand side of the screen will normally contain links to closely related pages on the same subject (these links may sometimes act as an index to information on the same page).

At the foot of the page you will find information on the date the page was last reviewed or last modified, and further links to key pages on the site.

Pages in the same current design as this one are designed so that the left-hand navigation bar will not be included when they are printed. This helps to produce a clearer printed result by omitting elements designed primarily for on-screen navigation.


You can search the text files on the DWI website by using the Search button above to bring up the search screen. Please enter the word or words to look for in the box, then start the search by pressing Enter.

You can look for several words either singly or in combination. You can also exclude words. For example:

to find pages containing information about lead, enter: lead
to find pages containing information about lead or pesticides, enter: lead or pesticides
to find pages containing information about both lead and pesticides, enter: lead and pesticides
to find pages containing information about lead, but not those that contain information about pesticides, enter: lead not pesticides

Remember that there are many synonyms for the terms used in this service. For example, you might find more information if you searched for lead or Pb.

Downloading files or documents

You are advised to save large files or files that you need to work on (interactive PDF forms, Excel or Word documents) onto your computer. In general, right-click on a link and select "save as" or "save target as".

File Formats

This site principally uses files of the following types. You may need to have the correct software loaded on your computer to make full use of the information available.


Documents marked PDF or Adobe Acrobat logo are saved in Portable Document Format (PDF). To read them you will need a copy of Adobe Acrobat Reader. The Acrobat Reader software is available for downloading free of charge.

Viewers with visual difficulties may find it useful to investigate services provided by Adobe to improve the accessibility of Adobe Acrobat documents - http://access.adobe.com

Note: We do not normally publish scanned documents but very occasionally this is unavoidable. We will try to make such documents as accessible as possible (including through automatic recognition of scanned text) but if you are unable to read any scanned documents, do contact us and we will endeavour to provide the material in a more accessible format.


DOC is the file type for documents created using Microsoft WORD. This is a widely used word processing package.


XLS is the file type for documents created using Microsoft EXCEL. This is a widely used spreadsheet package.

Page reviewed: 2 February 2011
Page modified: 2 February 2011

Drinking Water Inspectorate