Past Observances
- World Water Day 2012: Water and Food security
- World Water Day 2011: Water for cities: responding to the urban challenge
- World Water Day 2010: Clean Water for a Healthy World
- World Water Day 2009: Shared Water - Shared Opportunities
- World Water Day 2008: Sanitation
- World Water Day 2007: Coping with Water Scarcity
- World Day for Water 2006: Water and Culture
- World Day for Water 2005: Water for Life
- World Water Day 2004: Water and Disasters
- World Water Day 2003: Water for the Future
- World Water Day 2002: Water for Development
- World Water Day 2001: Water and Health
- World Water Day 2000: Water for the 21st Century
- World Water Day 1999: Everyone Lives Downstream
- World Water Day 1998: Groundwater: the Invisible Resource
- World Day for Water 1997: The World's Water, Is There Enough?
- World Day for Water 1996: Water for Thirsty Cities
- World Day for Water 1995: Women and Water
- World Water Day 1994: Caring for Our Water Resources is Everyone's Business