Suggestions of water related websites 

The Water Footprint Network
http://www.waterfootprint.org/

Aguanomics
http://www.aguanomics.com/

Circle of Blue - Keep up on the latest water news
http://www.circleofblue.org/waternews/

Water Technologies
http://www.intesesrl.com/

The FAO Water department
http://www.fao.org/nr/water/

World Bank on Food Security and Water
http://water.worldbank.org/WPP-Food-Security

OECD on Water Issues
http://www.oecd.org/environment/resources/water.htm

Data from the US Geographical Survey
http://www.usgs.gov/water/