The UN inter-agency co-ordination mechanism for all freshwater-related issues, including sanitation

Many UN entities work on water issues - distributing drinking water during disasters, protecting ecosystems, making sure that water is of sufficient quality, ensuring that our cities have enough water infrastructure, measuring progress of access to sanitation, looking at how we will have enough water to make food. The list is long.
Many organisations around the world also work on these issues. To be as strong, as effective and to have as big of an impact as possible, these organisations come together to work through UN-Water.
For World Water Day, UN-Water identifies upcoming challenges and sets the theme for the years to come. World Water Day 2016 will be around 'Water and Jobs', in 2017 around 'Wastewater' and in 2018 around 'Nature-based Solutions for Water'.