This Web Site is owned and operated by International Water Association. Use of this Web Site is subject to the Terms of Use. Please read the terms and conditions in full before you use the website.  The use of this website and downloads from it, and the operation of these terms and conditions, shall be governed in accordance with the laws of England and Wales.

Disclaimer of Liability
IWA or WHO is not liable to you or any other for any loss in connection with the use of this Web Site or a Linked Web Site. This general disclaimer is not restricted or modified by any of the following specific warnings and disclaimers.  We are not liable to you or anyone else if interference with or damage to your computer systems occurs in connection with use of this Web Site or a Linked Web Site. You must take your own precautions to ensure that whatever you select for your use from this Web Site is free of viruses or anything else (such as worms or Trojan horses) that may interfere with or damage the operations of your computer systems. We do not warrant that your access to the Web Site will be uninterrupted or error free or that any defects will be corrected. IWA excludes to the extent permitted by law all liability that may happen as a result of third party website material causing damages, costs, injury or loss of any kind.

IWA and WHO has sought to provide accurate information on this website. However, we may, from time to time, change or add to this Web Site (including these Terms of Use) or the information, products and services without notice. Nonetheless, we do not undertake to keep this Web Site updated. We are not liable to you or anyone else if errors occur in the information on this Web Site or if that information is not up-to-date.

The Terms of Use are effective until terminated by IWA and IWA may terminate this agreement and your access to the Web Site at any time without notice. In the event of termination you are no longer authorized to access the Web Site, but all restrictions imposed on you and all disclaimers and limitations of liability set out in the Terms of Use will survive.

The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of IWA or WHO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted lines on maps represent approximate border lines for which there may not yet be full agreement.

The mention of specific companies or of certain manufacturers’ products does not imply that they are endorsed or recommended by the IWA or WHO in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters.

All reasonable precautions have been taken by the IWA and WHO to verify the information contained in this website. However, the material on this website is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In no event shall IWA or WHO be liable for damages arising from its use.

This Web Site is IWA copyright property.

You are responsible for abiding with all applicable copyright laws. IWA and WHO permits you to view, copy, print material from this website, as long as the material is used for your personal and non-commercial use.  You may not, in any form or by any means:

Adapt, reproduce, store, distribute, transmit, print, display, perform, publish or create derivative works from any part of this Web Site (unless for personal use); or
Commercialize any information, products or services obtained from any part of this Web Site without our written permission.

Any copies of IWA or WHO material must include IWA copyright notice. No material is used on this website without the permission of the copyright owner. If you are the copyright owner of any material used on this website and you believe that your copyright is being misused you should email us at
In this Web Site:

“IWA” means International Water Association.
“WHO” means World Health Organisation.
“Linked Web Sites” means web sites of persons or entities other than International Water Association which are hyperlinked or otherwise from this Web Site.
“Web Site” means the whole or any part of the web pages located at
“We” and “us” refer to International Water Association and / or the World Health Organisation “our” has the same meaning.

© 2016 International Water Association