The theme of World Water Day 2010 on march 22 is: "Clean water for a healthy world." This them reaffirms that clean water is life, and our lives depend on how we protect the quality of our water.

Every year, 1,500 cubic kilometres of wastewater are produced globally. While waste and wastewater can be reused productively for energy and irrigation, it usually is not. In developing countries 80 percent of all waste is being discharged untreated, because of lack of regulations and resources. And population and industrial growth add new sources of pollution and increased demand for clean water to the equation. Human and environmental health, drinking and agricultural water supplies for the present and future are at stake, still water pollution rarely warrants mention as a pressing issue.

To do something about that 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.