http://www.wsportal.org/ibis/water-safety-portal/eng/welcome
[Accessed: 23.08.2010]
This WSPortal developed by WHO and IWA aims to contribute to improving and maintaining the safety of drinking water supplies through the effective implementation of WSPs. It contains collection of case studies, references and tools, which provide practical guidance and evidence-based material of relevance that can be applied appropriately for a range of circumstances.