The international observance of World Water Day is an initiative that grew out of the 1992 United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro.

Water Quality: Theme of World Water Day 2010
It is still a reality that an estimated 1.1 billion people rely on unsafe drinking-water sources. Therefore the theme of World Water Day 2010 is focusing on raising awareness of water quality under the theme “Clean Water for a Healthy World”. IRC International Water and Sanitation Centre offers a wide selection of documents looking at the different aspects of water quality such as water treatment, health and technology. This information is for instance, available via the IRC digital library, the Source Newsletter and on the IRC web site.
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WWD 2010: Clean Water for a Healthy World
UN-Water has chosen ”Clean Water for a Healthy World” as theme for World Water Day 2010. The overall goal of the World Water Day on 22 March 2010 campaign is to raise the profile of water quality at the political level so that water quality considerations are made alongside those of water quantity.
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World Water Day 2010 Highlights Solutions and Calls for Action to Improve Water Quality Worldwide

At least 1.8 million children under five years-old die every year from water-related diseases, or one every 20 seconds