Interim Report of Task Force 7 on Water and Sanitation, Millennium Project, 02/2004
 International Water Management Institute
 IRC International Water and Sanitation Centre
 The EU Water Initiative
 The United Nations GEMS/Water Programme
 UNEP Fresh Water portal
 UNEP/GRID - Arendal Water page
 Water Supply & Sanitation Collaborative Council (WSSCC)
 World Health Organization - Water, Sanitation and Health Programme
 World Water Assessment Programme (WWAP), UNESCO

Sanitation
 Extensive wastewater treatment processes adapted to small and medium sized communities (EC, 2001)
 Financing wastewater collection and treatment in relation to the Millennium Development Goals and World Summit on Sustainable Development targets on water and sanitation (UNEP, 2004)
 Sanitation for All -Promoting dignity and human rights (UNICEF, 2000)
 Toward a Strategic Sanitation Approach: : Improving the Sustainability of Urban Sanitation in Developing Countries (World Bank, 1997)

Please also check the "Multilateral environmental agreements" section under "Useful Links".